Did anybody install a huma reg in there air arms s400 mpr ft and how did they like it,I would like to keep it in the 12-14 ft pd range and what bar did they set the regulator at,shot count etc?
Thanks
Thanks
Did anybody install a Huma regulator in there Air Arm S400 MPR FT?
- Thread starter Osprey1
- Start date
You might want to check Rob Lane 's site as he has been doing them sub 12 fp. for the UK.market for a long time.
I would suggest a 1 inch plenum spacer and 120 bar reg setting to start fyi.
My personal MPR is a 6fp model that I upgraded to sub 12 fp. ,however I have not installed a reg in it,kelly
I would suggest a 1 inch plenum spacer and 120 bar reg setting to start fyi.
My personal MPR is a 6fp model that I upgraded to sub 12 fp. ,however I have not installed a reg in it,kelly
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If you want a huma, scott, AKA Motorhead is knowledgeable and can install it if you need. He is doing a S510 for me now.
good luck
bob
good luck
bob
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Doesn't need it. I wouldn't wanna introduce any form of cancer into any of my perfect shooting unregulated PCPs.
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Just blow off the first couple of shots if you do end up adding the potential cancer so you dont miss that first shots at the least opportune unwelcomed moments that you won't know till you missed after the fact and it won't be due to shooter error.
I would be mindful to store it right at the reg set pressure must in case.
Just rember it's an introduced part (cancer) that will require service sooner or later.
I would be mindful to store it right at the reg set pressure must in case.
Just rember it's an introduced part (cancer) that will require service sooner or later.
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You should learn how to tune a gun. It will keep yo cancer free and from giving out misleading advice.
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that’s actually sound advise. Reg creep is VERY normal and I always burn off or dry fire first shot if the Gun been sitting over night before I actually need to hit a house sparrow with a regulated gun. 1/4 inch POI shift might not be noticed by many but that is the difference between a headshot or miss.
Also reg creep has nothing to do with tuning the gun.
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Hey Q,
Does an unregulated gun have a flat shot string with low es over 400 to 600 psi range?
It would have to be one heck of a creeping reg to climb past 600 psi.
If you're getting high or low first shots, its not tuned properly.
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@RJ
yes, depends on the gun and a well tuned good unregulated gun can have a really flat shot string(might not be as long of a shot string as a regulated gun). My BSA ultra has ES of sub 7-8 and SD of around 3 within the sweet spot range or 2 mags. My 1701 and 1720 both have sub 10 ES very easily, all three guns will have 1 pellet hole in a vice/bipod or if I do my part. I know when they are off or when I goof because the POI is always at where I aim. Again, not everyone will even notice the first shot POI shift of 1/4-1/2 inch. A lot guns aren’t accurate enough to notice the 1/4 inch POI shift because the norm is 1/2 inch group at 20 yards, In these cases it doesn’t matter anyways it’s a crap shoot if you hit a small target to begin with regardless of first shot or not.
very bar is 14.5 psi and I notice major speed difference if the gun is off by 5-10 bars or 100-145 PSI, speed difference varies depends on the gun but easily over 30fps which will create noticeable POI shift at even 20 yards. With lighter ammo the difference is more than 100fps with my impact thanks to the PP. 10 bar creep is common especially if the regulator is worn or dirty.
if you are getting high or low first shot and consistent follow on shots it’s always reg creep on a regulated gun. Tuning is reflected by shot string and over all accuracy/groups but not the first shot on a regulated or unregulated guns.
Edit: OP is talking about a S400 FT gun which is a very accurate gun so he will notice reg creep POI shift. However he might be fine with scrubbing the first shot because his use case is not to hit a small pest at range or just remember to scrub first shot or two. The regulator will give a longer shot string and MUCH easier to tune. Odoyle is pointing out something that may not apply to everyone but sound advise if you want to hit a small target on the first shot every time after the gun been stored for than a few hours.
yes, depends on the gun and a well tuned good unregulated gun can have a really flat shot string(might not be as long of a shot string as a regulated gun). My BSA ultra has ES of sub 7-8 and SD of around 3 within the sweet spot range or 2 mags. My 1701 and 1720 both have sub 10 ES very easily, all three guns will have 1 pellet hole in a vice/bipod or if I do my part. I know when they are off or when I goof because the POI is always at where I aim. Again, not everyone will even notice the first shot POI shift of 1/4-1/2 inch. A lot guns aren’t accurate enough to notice the 1/4 inch POI shift because the norm is 1/2 inch group at 20 yards, In these cases it doesn’t matter anyways it’s a crap shoot if you hit a small target to begin with regardless of first shot or not.
very bar is 14.5 psi and I notice major speed difference if the gun is off by 5-10 bars or 100-145 PSI, speed difference varies depends on the gun but easily over 30fps which will create noticeable POI shift at even 20 yards. With lighter ammo the difference is more than 100fps with my impact thanks to the PP. 10 bar creep is common especially if the regulator is worn or dirty.
if you are getting high or low first shot and consistent follow on shots it’s always reg creep on a regulated gun. Tuning is reflected by shot string and over all accuracy/groups but not the first shot on a regulated or unregulated guns.
Edit: OP is talking about a S400 FT gun which is a very accurate gun so he will notice reg creep POI shift. However he might be fine with scrubbing the first shot because his use case is not to hit a small pest at range or just remember to scrub first shot or two. The regulator will give a longer shot string and MUCH easier to tune. Odoyle is pointing out something that may not apply to everyone but sound advise if you want to hit a small target on the first shot every time after the gun been stored for than a few hours.
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Agreed, all regs creep. But just as your non regulated gun can operate with a tight es over a 200 to 400psi range in the sweet spot, so can a creeping reg be tuned to with a 5-10 bar creep.
A gun tuned for a certain pressure range doesn't know if it has a reg in the tube or not.
My impact pp crept 5-7bar overnight also. Among a few others I've owned. But never had to waste a shot. My first shot was never more than 8fps high or low on the first shot. It just takes a little patience and fine tuning to tune the creep out. Id never settle for having to blow a shot off before the rifle was stable.
A gun tuned for a certain pressure range doesn't know if it has a reg in the tube or not.
My impact pp crept 5-7bar overnight also. Among a few others I've owned. But never had to waste a shot. My first shot was never more than 8fps high or low on the first shot. It just takes a little patience and fine tuning to tune the creep out. Id never settle for having to blow a shot off before the rifle was stable.
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Guess we can agree to disagree, you can’t really tune reg creep out as far as I know. A lot of good regulators will hold pressure for a long time and first shot won’t be off or by much but reg creep is normal. My huma aired 1720 has very mild creep here and there after a few days.
HOWEVER if the gun has transfer port adjustment and the port is the biggest bottle neck then yes, tune it high and the consistency is provided by the choke point as supposed to regulator. It is possible but it’s not necessary a “tune” per se, it’s more of the gun’s design not being any different than a unregulated gun.
if I tune my 1720 to the max speed of the TP then yes in theory the creep can be “tune” out but that not a tune I want. You are basically tuning to the tightest choke point not necessarily the speed you want or the speed the ammo wants. It might be accurate but it might not be and with that approach you are limited to the “tune” to one speed only. So basically you tuned the regulator out and why bother with a regulator at that point.
HOWEVER if the gun has transfer port adjustment and the port is the biggest bottle neck then yes, tune it high and the consistency is provided by the choke point as supposed to regulator. It is possible but it’s not necessary a “tune” per se, it’s more of the gun’s design not being any different than a unregulated gun.
if I tune my 1720 to the max speed of the TP then yes in theory the creep can be “tune” out but that not a tune I want. You are basically tuning to the tightest choke point not necessarily the speed you want or the speed the ammo wants. It might be accurate but it might not be and with that approach you are limited to the “tune” to one speed only. So basically you tuned the regulator out and why bother with a regulator at that point.
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No problem sir. But with the impacts valve adjustment...tuning around the creep was fairly easy. No mater shooting 18 grain at 32 fpe or 25 monsters at 50 fpe.
You may glean some information from this thread and its links.
Take care.
https://www.airgunnation.com/topic/quick-for-those-who-have-experienced-regulator-creep/
You may glean some information from this thread and its links.
Take care.
https://www.airgunnation.com/topic/quick-for-those-who-have-experienced-regulator-creep/
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ah I see, however the OP’s gun doesn’t have the valve adjuster.
also the valve is for fine tuning not to create a major choke point to create consistency. main goal of the valve is for ensure the valve closes before the pellet leaves the barrel to creat efficiency and accuracy, not consistency. It helps but not it’s main design goal. With impact barrel kit ranging from 500-700mm the valve really helps to fine tune/control the valve opening or better way to to put it is it’s there to time the valve closing for each barrel length. If you watch Ernest’s master class tuning video he explains everything in great details.
I can crank up the power and reduce the valve to make it act like a restricted TP but that’s not my personal approach to tuning. The impact is at its best if the valve, HS and regulator are working in harmony. There is no other gun like the impact.
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The S500 that I had suffered from a horrific POI shift throughout the fill, despite even being in the "sweet spot" which was quite small.
Adding a Lane reg was the best thing that ever happened to it, and fixed it. Also helped greatly with the piss poor shot count. I never noticed any first shot POI issues. Or leaks. Shot it a bunch.
It will be worth it IMO if it's done right.
A good simple reg like the Lane or Huma will very rarely ever give trouble.
Adding a Lane reg was the best thing that ever happened to it, and fixed it. Also helped greatly with the piss poor shot count. I never noticed any first shot POI issues. Or leaks. Shot it a bunch.
It will be worth it IMO if it's done right.
A good simple reg like the Lane or Huma will very rarely ever give trouble.
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LOL different stroke for different folks, you can tune your gun however you like.
@osprey1 AA is known for their bell curve, I don’t know about the s400ft personally but I assume it has good bit of the bell curve. From tuning and over all user experience I highly recommend a regulator and scrubbing off a shot really isn’t a big deal and you only need to do it if you are hunting really small critters, who cares if you are punching paper unless money is on the line.
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To introduce some clarity here the AA 400MPR and HFT 500 are unregulated purpose built FT guns set at just under 12fpe and tuned perfectly from the factory to give the smallest possible ES so no pronounved bell curve unless you try to mess with them. The S500 really needs a regulator in contrary real world comparison if you want more shots and not limit only 30 shots starting from 2700psi fill unless it's the sub 12fpe version.
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