FX Streamline .25 Chrony Data (JSB 25.39gr) (JSB King Heavy 33.95gr)

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FunGun

FunGun

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Jun 21, 2015
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OKLAHOMA, United States
Wanted to share some data I amassed shooting the FX Streamline .25 using two different JSB pellets. The gun was filled to 230Bar and no shots fired after fill that were not across the chrony, more on this in the summary below. The gun has not been modified or adjusted in any way. This is how it shoots as it came from the factory. Only mod is the DonnyFL Sumo moderator and a single shot tray (SST) from evensteven101 on ebay. More on the shot tray on a separate thread later. Here is the data from two strings of 10 shots each. 

Pellet: JSB EXACT KING .25 DIABOLO, 25.39gr
all velocities in feet/sec.
940.2
948.3
947.6
938.4
948.1
946.7
945.9
944.5
946.3
947.7
lowest 938.4, Highest 948.3, AVG 945.4, ES 9.92, Sd=3.31 (50.4fpe)

Pellet JSB EXACT KING HEAVY DIABOLO MKII 33.95gr
835.6
839.2
833.3
833.3
829.5
827.4
830.5
828.5
830.7
831.4
lowest 827.4, Highest 839.2, AVG 831.9, ES 11.88, Sd=3.60 (52.18fpe)

For some fun, I then shot the 25.39gr pellets at medium power and low power. Here are the observations.
25.39gr at medium power, velocity was 691.9fps with approx 1.0 inch drop from POA to POI at 30 yds. (27.0fpe)
33.95gr at medium power, velocity was 620.7fps with approx 2.25" drop from POA to POI at 30yds. (29.05fpe)

Ok I had nothing better to do this morning and had the equipment set up, so I shot the two pellets on LOW power, here are the results.
25.39gr at low power, velocity was 492.5fps with approx 5.0 inch drop from POA to POI at 30 yds. (13.68fpe)
33.95gr at low power, velocity was 441.7fps with approx 7.0" drop from POA to POI at 30yds. (14.71fpe)

In Summary:
The FX Streamline is one very nice piece of equipment! I like everything about this gun except for the little bit of play in the stock at the forearm. (I had to think really hard to come up with anything negative to say about this gun, so don't think this is foremost in my thoughts, it's really not) I knew about this from other reviews and so this was no surprise. Is it a big deal? no, not at all. You will not notice it when you carry the gun, or when you are shooting the gun, but if you were to pick the gun up simply by grabbing the fore-stock, you would feel a slight (flex) movement in the stock. So I just don't pick it up that way. lol. No biggie. This gun is sweet. The trigger is wonderful as it comes from the factory. I am guessing around 7 oz. I don't have a gauge right now but based on my Bobcat and Vulcan (a highly modified trigger), it is very nice.

PERSONAL OBSERVATION: After shooting several hundred rounds thru the gun I have noticed that this gun does not have a typical symptom of many other PCP style guns. This gun does not shift POI after being filled. This is a big deal for me. I like IT! I kid you not, I fill this gun up in the morning after shooting in the evening and it has been sitting overnight and I go out and shoot a bullseye at 30yds. I am talking the center of a .301 diameter, 25Meter 9 ring target, that I am shooting at 30yds. So far this has happened more times than I can count. I am always waiting for the first shot to be off after a fill, and with this gun, it has not happened yet. That is a big deal for me. You read about these guys saying you got to shoot three times after a fill the get the regulator set back, which I have to do with some other PCP rifles. But so far with the Streamline, fill it up and shoot and she is as true as she can be. I kinda like that. IF you like what I have done, some positive accuracy points would be greatly appreciated! Thanks, and have some fun with your gun!
 
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Streamline is a 900 psi rated Airgun in .25, but your totally stock Streamline shot a string from 948 - 938 ? I understand the 2nd string with heavys at 839 - 827psi that sounds right but how did you get such a high 1st string with 25,4s with a stock rifle or does the high setting make that much difference then what the specs show at 900psi....If the streamline shoots mid 9 hundreds stock I'd be interested in one.....Is the info wrong on the listing of it with 900psi,I'm confused.
 
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"Imold"Streamline is a 900 psi rated Airgun in .25, but your totally stock Streamline shot a string from 948 - 938 ? I understand the 2nd string with heavys at 839 - 827psi that sounds right but how did you get such a high 1st string with 25,4s with a stock rifle or does the high setting make that much difference then what the specs show at 900psi....If the streamline shoots mid 9 hundreds stock I'd be interested in one.....Is the info wrong on the listing of it with 900psi,I'm confused.
Click to expand...
900psi? {(pounds per square inch) this is a pressure measurement}
Not sure what you mean by 900psi, so maybe you could elaborate?
The shot string is a measured velocity of "feet per second" fps. I do notice that the airgun of arizona ad does advertise the .25 to shoot up to 44ft/lbs of energy, and mine is calculated to be as high as 52.18 ft-lbs at the muzzle. Is this something you are in reference to with the 900psi? sorry I'm just a little lost with your question, but would be happy to run this to ground to answer if I can help.

EDIT: after posting this I looked up the data as supplied by FX on their website for the streamline and it does have the velocity rating for the .25 to be 890ft/s (fps). Is this the number you are in reference to in your comment?
 
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"FunGun"Waiting for the delivery truck is the hardest part....tick....tock....Hope the time passes quickly for you! It will be worth it, did you get a wood stock or the syn? Mine is the Syn. Your in for some fungun time next week! keep us informed.
Click to expand...
I ordered the laminate stock. Yeah the waiting sucks. It should have been here Wednesday, but shipping guy took part of day off friday, and they overlooked it for Monday's shipment. No worries though, but makes you really antsy for it to arrive. 
 
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I ment fps sorry I was tired...Under FX specs it shows the Streamline at 900 fps but you got mid 900 fps thru chrono with 25,39...I understand the heavys 33,95s getting 827 - 839 but it's such a big jump to 25,4s........Air Depot has the FX Streamline in .25 caliber listed at 900 FPS how did you get 938 to 948 feet per second on a stock Streamline with only a Mod on it....
 
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"Imold"I ment fps sorry I was tired...Under FX specs it shows the Streamline at 900 fps but you got mid 900 fps thru chrono with 25,39...I understand the heavys 33,95s getting 827 - 839 but it's such a big jump to 25,4s........Air Depot has the FX Streamline in .25 caliber listed at 900 FPS how did you get 938 to 948 feet per second on a stock Streamline with only a Mod on it....
Click to expand...
ah, that makes sense. Thought that might be what you were talking about, just was not sure. I thought you might know a different parameter about the gun I was unaware of, so I was wanting to learn more...lol. So back to your question. I agree with your assessment of the advertised velocities. As I mentioned before FX advertises 890fps, so I am wondering if something is wrong with my Chrony? 

So I went and checked some other published reviews and right off I see Steve over at airgun exploration and advancement channel was shooting (.22) the heavies at 890fps and the 15.89gr at 930'sfps and FX advertises the .22 at 910fps, so he is getting about 20fps over advertised velocities. Yet mine is about 50fps over advertised, so I'm not thru investigating yet. Next stop was Texas Airgunner on youtube and he is shooting a .25 streamline 25.39gr on high power at High=937fps and a low=905fps over a 50 shot string. I will admit mine is a bit higher than his as well.

I have done nothing with the gun to adjust speeds. The gun is as it was from the factory. Only difference is mine is a bit newer than either of those two guns, so maybe FX is tuning them a bit higher from the factory? I hope some of you guys that are getting your new streamlines in the next couple of weeks will post your chrony data so we can compare. Great observation Imold, I appreciate you pointing this out. ((+) coming your way) I'm going to take some of my old data on some other guns and re-shoot them across the chrony and see if there is any change in my chrony readings from a year or so ago and compare. Just how accurate are our chronnies anyway? Might be a good subject for another thread! I might just go start that subject now and see what everyone has to say. lol.
 
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My FX Streamline .25 w/ 25.39 JSBs896907906903908903895895904908902905905912920927925926922925932934928910900

weird, forum is taking out all the carriage returns.

I'll snap a screen shot

f25d466eddd8f5dba50e514dd622156a.jpg

 
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Its just that not to often a mfg will show their Airgun shoots 900 fps that it realy does,it really means you should get around 850 fps or around there, I mean they usually use a lighter pellet but will let you know, so that's what is throwing me off on the Streamline....Its advertised at 900 fps and your getting 930s - 940s with 25,39s...That's awesome if it's right. I've been looking at the 500Royale and before that it was the Streamline,I don't need all the bells and whistles that come with the Crown or impact I just would like another nice shooting .25 that gets between 900-1000 fps, I do have a Hatsan Bt65sb Elite QE but had to send it back due to barrel droop, waiting to get it back now, my Bullboss.25 is a nice Airgun and so is my Marauder.25 but just want another nice .25 caliber for my collection..
 
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The FX streamline would make a nice addition to your stable! I agree with your comment about what they typically advertise and how it is usually much less. I am doing some research and shooting some other guns over it that I have recorded data on their velocities and will be comparing. I started a thread over in the equipment area about chronys and their accuracy so maybe I will get some more ideas on ways to verify my chronys accuracy. You bring up a very good point. Maybe the FX way of advertising is to under promise and over deliver? Wouldn't that be refreshing way of doing business. lol. I must say I am impressed with the streamline.
 
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"MonsterMaxx"My FX Streamline .25 w/ 25.39 JSBs896907906903908903895895904908902905905912920927925926922925932934928910900

weird, forum is taking out all the carriage returns.

I'll snap a screen shot

f25d466eddd8f5dba50e514dd622156a.jpg









Click to expand...
Monstermaxx I hate to say but a fully regulated, properly setup balanced PCP does not have a bellcurve like yours.It should be flat with a dropoff. Yours is behaving like a cheap unregulated knock open valved only gun, it is not too bad for an unregulated gun but the curve is there.
Maybe you can balance it with fiddling with the reg and hammer if you can sort it like that
To me it seems that the reg failed on you already.

my diagnosis is based not on shot to shot variation but in the trend we can see, power starts lower then it peaks, and slowly declines.
 
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As requested I ran my gun over the chrony this evening and here is the shot strings.
setup: 
-Streamline .25 high power setting w/Donnyfl Sumo installed
-Competition electronics ProChrono w/ front sensor 8″ from end of Sumo
-JSB 25.39gr pellets unsorted 
–All pressures as read by gage on streamline
All velocities in Feet Per Second
starting pressure 230 bar
string1 string2 string3
1-910 11-910 21-908
2-914 12-911 22-913
3-911 13-913 23-914
4-908 14-912 24-915
5-913 15-913 25-914
6-915 16-911 26-911
7-910 17-911 27-916
8-913 18-914 28-915
9-914 19-916 29-917
10-911 20-917 30-913
205 bar 180 bar 160 bar
Average first 3 strings.
Avg 912 
Es 9
SD 2

String 4
31-907
32-910
33-915
34-913
35-914
36-911
37-914
38-915
39-919
40-914
140 bar

Average of all 4 strings.
AVG 912
ES 12
SD 2
 
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"Dave"As requested I ran my gun over the chrony this evening and here is the shot strings.
setup: 
-Streamline .25 high power setting w/Donnyfl Sumo installed
-Competition electronics ProChrono w/ front sensor 8″ from end of Sumo
-JSB 25.39gr pellets unsorted 
–All pressures as read by gage on streamline
All velocities in Feet Per Second
starting pressure 230 bar
string1 string2 string3
1-910 11-910 21-908
2-914 12-911 22-913
3-911 13-913 23-914
4-908 14-912 24-915
5-913 15-913 25-914
6-915 16-911 26-911
7-910 17-911 27-916
8-913 18-914 28-915
9-914 19-916 29-917
10-911 20-917 30-913
205 bar 180 bar 160 bar
Average first 3 strings.
Avg 912 
Es 9
SD 2

String 4
31-907
32-910
33-915
34-913
35-914
36-911
37-914
38-915
39-919
40-914
140 bar

Average of all 4 strings.
AVG 912
ES 12
SD 2
Click to expand...
That is nice, never thought a stock Streamline would shoot like that,even with the Sumo installed..
Dave is it pretty much the same without the Sumo on it ?
 
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"FunGun"The FX streamline would make a nice addition to your stable! I agree with your comment about what they typically advertise and how it is usually much less. I am doing some research and shooting some other guns over it that I have recorded data on their velocities and will be comparing. I started a thread over in the equipment area about chronys and their accuracy so maybe I will get some more ideas on ways to verify my chronys accuracy. You bring up a very good point. Maybe the FX way of advertising is to under promise and over deliver? Wouldn't that be refreshing way of doing business. lol. I must say I am impressed with the streamline.
Click to expand...
It kinda opened my eyes up to,don't think the 500 Royale is like that think it's more in the 850 + or - but not over 900fps, that's 2 Streamlines that are shooting at or over 900 advertised fps, it's a head scratcher for sure and about or close to half the cost of a Royale..
 
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If I could get a Streamline out of the box that shot like that I wouldn't even worry about a Royale or a Crown for that matter because the Streamline would be a 125 yard bench gun for sure but with my luck I'd get one that only shot mid 850's, it would still get me to 100 yards + but the drop would be quite a bit more out to 125 yards +.....At 109 yards with my .25 Bullboss (advertised 970 fps I think) I hold my 1st moa line at the top of my 8" gong and my 2nd moa line is about in the middle of the gong I can ring it every time, I haven't run it thru my ProChrono yet so I don't know what my fps is but I'm guessing it's around 900 with JSB Exact Kings 25,39.
 
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"Imold"
That is nice, never thought a stock Streamline would shoot like that,even with the Sumo installed..
Dave is it pretty much the same without the Sumo on it ?
Click to expand...
I filled her up and ran a single string of ten. I installed the Sumo to measure to the first sensor of the chrony, so that the gun's muzzle was at the same distance as with the sumo installed.

1-917
2-915
3-918
4-920
5-920
6-915
7-917
8-916
9-915
10-914

Avg 916
ES 6
SD 2

It looks a though a few FPS were lost with the sumo installed, which is probably pretty typical of all moderators.

For fun I brought my 22 Mrod down to see the effectiveness of the sumo as compaired to the stock mrod which is shooting 18.13gr JSBs at 890 FPS. With the Sumo installed the streamline is much quieter than the mrod. I was having a hard time telling the streamlines noise over the pellet hitting my steel trap at 12 yards. The Sumo seams very effective, and since I pest at medium power with neighbor's that live nearby I doubt they can discern what they are hearing. 
I took a few shots outside, and the main noise I hear is the metallic sound of the hammer momentarily hitting the valve, which seems louder than the report made by the rifle.
 
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