Has someone pre-mapped (and made a chart or spreadsheet) the best speed for different weight and caliber for JSB specific pellets?
Or
Other brands?
My primary interest is JSB
Or
Other brands?
My primary interest is JSB
jsb speed versus in flight stability question
- Thread starter cavedweller
- Start date
All my barrels are the Original Smooth Twist, bit of a different animal from fully rifled barrels. However, the speed at which they shoot seems right in the neighborhood where other guys are showing good accuracy. My .22 is shooting JSB, 18.13gr @ 890fps, my .25 shooting JSB 25.39gr (& Hades) @ 876 and my .30 is shooting JSB 44.75gr @ 855fps. All 3 guns are superbly accurate. Like I said, right in that neighborhood. Maybe up to 920fps with the .30 (that's what it would need to be at to push the Hades)
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Edgun R5 LW .30 JSB 44.75 @ 895 Veteran STD LW .25 JSB 33.95 @ 890 RTI Prophet Compact CZ .22 18.1 JSB 18.1 @ 900 RTI Prohpet STD LW .25 JSB 33.95 @890
Yup. Definitely a pattern.
Yup. Definitely a pattern.
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Yup, I think the 860 to 920 range will do most. you have to try your gun by twist and reg pressure to find the clean non spiraling perfection.
my maverick like Mark 2 @ the 900 / 920 end of it. . 38.9 NSA likes 895.
my maverick like Mark 2 @ the 900 / 920 end of it. . 38.9 NSA likes 895.
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Veteran .25 and Vulcan 3 .177 both love the diabolos in the mid - upper 800's.
Happy with the FX 13.4's at 860 last weekend:
Happy with the FX 13.4's at 860 last weekend:
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Interesting that none of the .177 shooters have piped in? Esp the hunter field target peeps.
I am seeing a trend here - 860 fps upwards to 910 fps. What this does is give me and others a starting point and that's really what myself and others might be looking for. I am surprised the pellet makers don't share some projected best speeds and favorite barrels by pellet type and weight?
I am seeing a trend here - 860 fps upwards to 910 fps. What this does is give me and others a starting point and that's really what myself and others might be looking for. I am surprised the pellet makers don't share some projected best speeds and favorite barrels by pellet type and weight?
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I think there are just too many variables for the pellet makers to get involved in that kind of recommendation. Their goal is to make consistent pellets.
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Plus it'll conflict with all cheap air gun makers and newbies advertising and looking for a gazillion feet per second.
None of of my springers push their favorites pellets past 910. All but two fall between 700 and 800. That's 177, 20 and 22. All of them very accurate with no real stability problems until you get past their intended useful range.
JSB gives you no recommendations and BC on their pellets. H&N gives you very basic information. I guess since every barrel and gun is different it's impractical for them to pigeon hole their own products for certain parameters.
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I am no expert here, shooting my .177 rifles i have just assumed that the good speed for pellets are somewhere between 950 and 800 FPS.
So that is the speeds i shoot for, generally starting at the high number and then working my way down in speed.
I too am amazed that pellet makers / rifle makers dont have spreadsheets where shooters could look up the approximate best speed for what ever pellet / slug they want to try.
Really all they had to do was make the space available on their internet platforms, and then have users enter their values, and you would soon have a useful tool.
It would probably be best if it was the rifle makers that did it, as they then only had to cover their own platform / barrels, where as if a pellet maker did so they had to account for all the flavors of barrels from a multitude of brands.
I cant code for the life of me, i just assume such a feature would not be hard to do for someone with that skill.
So that is the speeds i shoot for, generally starting at the high number and then working my way down in speed.
I too am amazed that pellet makers / rifle makers dont have spreadsheets where shooters could look up the approximate best speed for what ever pellet / slug they want to try.
Really all they had to do was make the space available on their internet platforms, and then have users enter their values, and you would soon have a useful tool.
It would probably be best if it was the rifle makers that did it, as they then only had to cover their own platform / barrels, where as if a pellet maker did so they had to account for all the flavors of barrels from a multitude of brands.
I cant code for the life of me, i just assume such a feature would not be hard to do for someone with that skill.
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at airgun warriors there is this interesting thread... but again i am looking to create a great starting place for people to fine tune their gun / pellet choice: https://airgunwarriors.com/communit...ing-a-gun-what-do-pellets-have-to-do-with-it/
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850 to as far as 960 I tested 177 22 cal fx new liners seem to me they like them little faster than the norm. But everyone is different and usually you here 860-900 fps. 60 yards and in far as I can go testis all I can say. 177 liners have different twist rates then the 22 cal.
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I wouldn't think so. Speed is speed - unless you mean the barrel length required to get a pellet up to the speeds listed above.
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its not that a certain weight/brand of pellets likes a certain speed
its that all pellets (no matter caliber/brand or weight) dont like to go too fast,
a product of their design if you will.
so what youre going to find is that no pellets like super fast speeds,
but they have no problem with slower speeds.
but when you get the speed up near the trans sonic region they can destabilize, and thats where accuracy suffers.
food for thought lol
its that all pellets (no matter caliber/brand or weight) dont like to go too fast,
a product of their design if you will.
so what youre going to find is that no pellets like super fast speeds,
but they have no problem with slower speeds.
but when you get the speed up near the trans sonic region they can destabilize, and thats where accuracy suffers.
food for thought lol
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As already mentioned, not if we base it on muzzle speed. But it could depend strongly on barrel twist.
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But, what does all that really mean? Get a bunch of pellets and go test them. No free lunches.
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I thought it was the 11th commandment that “thou shalt not shoot diabolo pellets faster than 900 fps”.
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Yup, that's exactly what I was getting at.
If I go from accurate at 810 fps to accurate at 850 fps by swapping to a longer barrel, I don't know that that means I should be aiming for 850 fps with the shorter barrel.
I'd love a chart like this, but I'd think the speeds would be a range for each pellet.
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In my limited experience I've found around 950fps to be the upper limit for retaining excellent accuracy. Most barrels seem to prefer them in the 850-920 range.
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