Brocock Sniper HP in the house
- Thread starter mcoulter
- Start date
I have been chasing down my accuracy again after turning down the reg and playing at lower velocities. I have brought it back up to about 155-160 bar (hammer spring was about 2 turns in) and wanted to run some crosman pellets through it to see if leading the barrel might make any difference. Much to my surprise they shot OK at 50 yards at 850 fpe and 930 fps. Not surprisingly, they did not group at anything higher.
I was playing with hold-overs here so the points of impact for the different velocities won't make sense ;-)
The left two groups really surprised me. The bottom right was at power setting #4 (1005 fps). Top right was all over the place as the wind picked up.
I also updated this part of the thread with more detailed velocities from the CPUMs:
https://www.airgunnation.com/topic/brocock-sniper-hp-in-the-house/#post-725599
I was playing with hold-overs here so the points of impact for the different velocities won't make sense ;-)
The left two groups really surprised me. The bottom right was at power setting #4 (1005 fps). Top right was all over the place as the wind picked up.
I also updated this part of the thread with more detailed velocities from the CPUMs:
https://www.airgunnation.com/topic/brocock-sniper-hp-in-the-house/#post-725599
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Awesome groups on the left mcoulter. My sniper hp doesn't shoot either the CPUM or cphp that great. Neither is bad, but not good enough for me to justify the cost savings and still enjoy shooting them.
I did have a new find today that I'll share. My first order of jsb ko's showed up in the mail from trenier when I got home from work. I only had a short time to try a few before company was over for a cookout. I was able to get the chrony out and get a mag full of each .216 and .217 downrange. These are the first slugs I've shot period. Neither group was awesome, but both were promising. There was a decent swirling wind, so conditions weren't perfect. The .216 averaged 870 fps and the .217 averaged 875 fps.
I did have a new find today that I'll share. My first order of jsb ko's showed up in the mail from trenier when I got home from work. I only had a short time to try a few before company was over for a cookout. I was able to get the chrony out and get a mag full of each .216 and .217 downrange. These are the first slugs I've shot period. Neither group was awesome, but both were promising. There was a decent swirling wind, so conditions weren't perfect. The .216 averaged 870 fps and the .217 averaged 875 fps.
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Wow, those look really promising! Certainly a bit better than the NSA .217 slugs I've tried!
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Did you ever have an "AHA!" moment? Well, I sure had one today with the Sniper.
I have been chasing accuracy for a week or two and wondering if the care and feeding of a LW poly barrel would be THAT different from any other barrel I have had... (see post here https://www.airgunnation.com/topic/lw-polygon-barrels/).
Well today i had more "meh" accuracy. Based on the vendor's (SPAW) suggestion, I gave the barrel ANOTHER good cleaning (just with my crown saver and ballistol patches). In doing so, I did pull out a bunch of lead from the barrel from shooting some H&N and Crosman pellets - I had been using these to see if leading the barrel more might help with accuracy.
Anyhow, I also decided to pull the barrel's end cap and well looky here... There might be some touches from pellets going on.:
I measured the inner diameter of the end cap and it's about 7.25mm. That seems like it would be big enough for a 5.5mm (.22) caliber pellet... This works out to be 0.875mm on any side of the pellet as it passes through this area. And here's the rough spacing between the end of the barrel and end cap:
And here are a couple of groups. One with the shroud but NOT the end cap. The other group was shot with NEITHER the shroud NOR the end cap. JSB Monster (880-890 fps) redesigned at 62 yards. Some difference, huh?
So far the gun's power plant / regulator have been great. No issues there. The gun handles fantastic. The trigger is now very good (almost on par with a fx royale I used to own). I"m really hoping to come up with a good solution that allows the gun to shoot as well with the shroud and end cap as without!
(And yes, the gun is LOUD without the end cap on!)
I have been chasing accuracy for a week or two and wondering if the care and feeding of a LW poly barrel would be THAT different from any other barrel I have had... (see post here https://www.airgunnation.com/topic/lw-polygon-barrels/).
Well today i had more "meh" accuracy. Based on the vendor's (SPAW) suggestion, I gave the barrel ANOTHER good cleaning (just with my crown saver and ballistol patches). In doing so, I did pull out a bunch of lead from the barrel from shooting some H&N and Crosman pellets - I had been using these to see if leading the barrel more might help with accuracy.
Anyhow, I also decided to pull the barrel's end cap and well looky here... There might be some touches from pellets going on.:
I measured the inner diameter of the end cap and it's about 7.25mm. That seems like it would be big enough for a 5.5mm (.22) caliber pellet... This works out to be 0.875mm on any side of the pellet as it passes through this area. And here's the rough spacing between the end of the barrel and end cap:
And here are a couple of groups. One with the shroud but NOT the end cap. The other group was shot with NEITHER the shroud NOR the end cap. JSB Monster (880-890 fps) redesigned at 62 yards. Some difference, huh?
So far the gun's power plant / regulator have been great. No issues there. The gun handles fantastic. The trigger is now very good (almost on par with a fx royale I used to own). I"m really hoping to come up with a good solution that allows the gun to shoot as well with the shroud and end cap as without!
(And yes, the gun is LOUD without the end cap on!)
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My Brocock (.25) was the same way. When New the groups were good but nothing special. I put more and more rounds downrange, cleaned the barrel often, and it was getting a bit better. I read on this forum somewhere that the Moderators primary advantage to a shooter is that the baffles help to disperse the air leaving the barrel, so there is not as much of a puff of air hits back of the pellet as it leaves the barrel. I emailed Donny FL to get their recommendation for my particular caliber and model. accuracy was greatly improved. Hope this helps
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Hi @5DPatrick, which moderator did you end up selecting? I actually did have one that has been damaged due to the clipping. So i really need to think through and diagnose the root cause here so I don't damage another one. The issue is that the gun is decently quiet and while it would be nice for the gun to be a bit more quiet, it's not necessary for where I shoot. However, I do see value if using one helps with accuracy.
FYI - Here's what I noticed at the end of my moderator
. And the clipping I saw was bad enough that I had pellet entirely miss my bullet box. This definitely never happened with this moderator on my previous gun (Kral Big Max .22).
I will say that the gun is shooting straight again. The last barrel cleaning really did help with accuracy. I removed the barrel, gave it a good cleaning with ballistol, patches, and crown saver and also removed/replaced the breech seal while I was in there. I also lubed up the oring that sits on the barrel collar. This helped a bit when sliding the shroud over it again.
I had a short period of time this evening when the winds were perfectly still and shot some quick groups. These are 10-shot groups at 62 yards (JSB Monster Redesigned). The stickers I use for aim points are 1/2 inch.
It seems like the gun takes 4-5 shots to settle in (top left) but the next two (center, top right) were great. As noted on the target, the wind did pick up a bit for the bottom two groups. I'm actually glad the wind did pick up, it gave me some good perspective on how these larger .22 handle the wind when the gun was shooting well.
FYI - Here's what I noticed at the end of my moderator
. And the clipping I saw was bad enough that I had pellet entirely miss my bullet box. This definitely never happened with this moderator on my previous gun (Kral Big Max .22).I will say that the gun is shooting straight again. The last barrel cleaning really did help with accuracy. I removed the barrel, gave it a good cleaning with ballistol, patches, and crown saver and also removed/replaced the breech seal while I was in there. I also lubed up the oring that sits on the barrel collar. This helped a bit when sliding the shroud over it again.
I had a short period of time this evening when the winds were perfectly still and shot some quick groups. These are 10-shot groups at 62 yards (JSB Monster Redesigned). The stickers I use for aim points are 1/2 inch.
It seems like the gun takes 4-5 shots to settle in (top left) but the next two (center, top right) were great. As noted on the target, the wind did pick up a bit for the bottom two groups. I'm actually glad the wind did pick up, it gave me some good perspective on how these larger .22 handle the wind when the gun was shooting well.
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My .25 cal has a .30 cal Donny FL Shogun. It is a bit long, but really helped out. I really don't care much about noise, I just keep it on for the accuracy. I may take it off tomorrow and shoot it without the Moderator to see if there is still a difference. My gun has a few thousand rounds through it, so maybe things have changed.
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Thanks @5DPatrick, I'd love to see any difference in how your gun performs with and without the Shogun.
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Ok, here are some targets shot today. All at 50 yards. I shot 2 types of ammo, FX Hybrids @940FPS, and JSB Heavy MarkII 34gn. All are 5 shot groups. I shot 5 FX and 5 JSB with the Shogun on, Then the same with the Shogun off. I did a follow up group of 5 with the JSB and the Shogun in the final pic just to show its effectiveness. from behind the gun in the open field, I did not notice any difference in sound.
FX Hybrids with Shogun
JSB With Shogun
FX Barrel nut, no Shogun
JSB with Barrel Nut, No Shogun
JSB with Shogun reinstalled
Hope this helps. Hope your results are similar.
FX Hybrids with Shogun
JSB With Shogun
FX Barrel nut, no Shogun
JSB with Barrel Nut, No Shogun
JSB with Shogun reinstalled
Hope this helps. Hope your results are similar.
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All shots were aimed for the red dot. The POI change with the Moderator removed was high, as expected. Pic 4, the 5 shots on target were the ones shot in this test. The other holes, off the paper were from a previous outing. The JSB Mark II's were @875FPS. I am in Colorado @5,000+ ft elevation and it was over 100 degrees during this shoot. I think the thin dry air here works to my advantage.
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I shot quite a bit this past weekend. I ended up dropping the reg pressure again and got good results (135 bar and 2.5 turns on the hammer spring). It was shooting Monster Resigned .22 around 840 to 850 fps. Here are a couple of my last groups (10-shots / 50-yards)
And then this happened (turn up your volume):
https://youtu.be/9ofcIyYoHNw
And then this happened (turn up your volume):
https://youtu.be/9ofcIyYoHNw
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What’s with the dumping air video... was there a fix? What was the issue? Left us hanging...
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@L.Leon, based on SWAW's recommendation, I contacted Precision Airgun Distribution (PAD) and ended up shipping it out to Arizona today (it's under warranty).
To me it seems clear that the firing valve developed a leak. I would normally just open it up and see what's going on, but this is a new gun and I also wanted them to ALSO examine the barrel. Like the target shows above, the gun IS capable of very good accuracy, but I have never had a barrel that needed to be cleaned as much as this one.
So it looks like I'll be shooting my Cricket for awhile. :-/
To me it seems clear that the firing valve developed a leak. I would normally just open it up and see what's going on, but this is a new gun and I also wanted them to ALSO examine the barrel. Like the target shows above, the gun IS capable of very good accuracy, but I have never had a barrel that needed to be cleaned as much as this one.
So it looks like I'll be shooting my Cricket for awhile. :-/
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@mcoulter, thanks, that went right over my head. I had a leak at the inlet valve on mine (my fault) from accidentally filling too fast. That was an easy fix. Do please keep us posted on what develops with your Sniper HP.
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I received confirmation from AoA that the gun is on its way home. They fixed the leak, did a full re-seal, and swapped out the barrel for me. It'll be interesting to see if this barrel behaves differently. The original barrel needed extremely frequent cleaning and when being cleaned would spit out some pretty significant chunks of lead.
Pulling out several of these in any cleaning (with just patches and ballistol) was not uncommon.
Pulling out several of these in any cleaning (with just patches and ballistol) was not uncommon.
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My Brocock arrived yesterday and I have to complement AoA on how they handled the warranty work.
They get Two BIG thumbs up!
Their repair included:
The valve failed as I was testing some lower reg pressures. AoA also brought the gun back up to its original configuration (reg just over 150B) and included a 10-shot string and sample target (20 yards). Their string was just a bit lower than what my chrony is showing (882 fps vs 895) but I suppose that could just be a calibration issue between our devices. What also surprised me is that they also returned my trigger to its original adjustment. I have to assume this is a CYA liability thing / standard practice. No problem here, it's an easy adjustment to make.
So in the few minutes I had to test, I threw my scope back on and set out target at 50 yards. My first group (left most below) hit a couple inches to the left but dead on in elevation. In these first four groups of 5-shots I'm already seeing accuracy better than my original barrel (and these shots were rushed and in moderately windy conditions).
I'm probably going to make my small adjustment to the trigger and shoot the heck out of it just the way it is. In my pellet / adjustment testing with the original barrel, I pretty much came to the conclusion that this gun is likely a one-trick pony when it comes to how it likes to shoot (45 fpe with JSB Monster Redesigns).
And I'm perfectly fine with that!
They get Two BIG thumbs up!
Their repair included:
- The main problem which caused the gun to dump its air (replacing the valve peak seal)
- A complete reseal
- Replacement of the barrel
The valve failed as I was testing some lower reg pressures. AoA also brought the gun back up to its original configuration (reg just over 150B) and included a 10-shot string and sample target (20 yards). Their string was just a bit lower than what my chrony is showing (882 fps vs 895) but I suppose that could just be a calibration issue between our devices. What also surprised me is that they also returned my trigger to its original adjustment. I have to assume this is a CYA liability thing / standard practice. No problem here, it's an easy adjustment to make.
So in the few minutes I had to test, I threw my scope back on and set out target at 50 yards. My first group (left most below) hit a couple inches to the left but dead on in elevation. In these first four groups of 5-shots I'm already seeing accuracy better than my original barrel (and these shots were rushed and in moderately windy conditions).
I'm probably going to make my small adjustment to the trigger and shoot the heck out of it just the way it is. In my pellet / adjustment testing with the original barrel, I pretty much came to the conclusion that this gun is likely a one-trick pony when it comes to how it likes to shoot (45 fpe with JSB Monster Redesigns).
And I'm perfectly fine with that!
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Congratulations on getting it back! AoA has outstanding repair services for warranty work! I had a Compatto that got a leak and they also did a full reseal under warranty. Your new barrel is a laser 
out of the box.
out of the box.Upvote 0
Thanks @Ranchibi 
There's something that I didn't mention in my previous post which still does not make sense to me...
I shot my Cricket .25 quite a bit while the Brocock was being repaired. Within a few shots after going back to the Cricket, it became immediately evident that it was much more stable as it was being shot. (The Cricket is about 54 fpe and the Brocock is about 45 fpe.) It was simply harder to keep a good follow-through on the target after pulling the trigger on the Brocock. And this is was the case regardless of the reg or hammer spring setting i tried. My initial thought was that sure, the Cricket is a heavy feeling gun. (The synthetic stock makes it quite the tank!) But now that I have both guns back, I weighed them and they're actually the same. According to my highly accurate bathroom scale anyway!
So getting back to the shots I took on the above target, the left two groups were shot from the bag in the pic and the right two groups were shot with rather beat up and wobbly UTG 360 bipod. I can honestly say that the gun now as a different feel with each method of support. My view of the target while shooting the Brocock is now much more stable. How or why this is, I simply cannot explain. Now I really wish I had the ability to capture some scope cam footage to demonstrate.
Oh well!
There's something that I didn't mention in my previous post which still does not make sense to me...
I shot my Cricket .25 quite a bit while the Brocock was being repaired. Within a few shots after going back to the Cricket, it became immediately evident that it was much more stable as it was being shot. (The Cricket is about 54 fpe and the Brocock is about 45 fpe.) It was simply harder to keep a good follow-through on the target after pulling the trigger on the Brocock. And this is was the case regardless of the reg or hammer spring setting i tried. My initial thought was that sure, the Cricket is a heavy feeling gun. (The synthetic stock makes it quite the tank!) But now that I have both guns back, I weighed them and they're actually the same. According to my highly accurate bathroom scale anyway!
So getting back to the shots I took on the above target, the left two groups were shot from the bag in the pic and the right two groups were shot with rather beat up and wobbly UTG 360 bipod. I can honestly say that the gun now as a different feel with each method of support. My view of the target while shooting the Brocock is now much more stable. How or why this is, I simply cannot explain. Now I really wish I had the ability to capture some scope cam footage to demonstrate.
Oh well!
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