Anyone happen to know the twist rate of barrels for Air Arms Rifles

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jdanvers

jdanvers

Member
Jul 7, 2019
951
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South Central Upstate NY, United States
Specifically the S510 XS Ultimate Sporter - 22 cal.? Apparently it's a "secret" that AA isn't willing to share. For real. {sigh} I'm looking to set it up in strelok pro and among the many questions that it (strelok) wants to know for cfg of a given gun is barrel twist rate, and left or right handed twist. I didn't think such a thing would be a "state secret" (lol) BUT apparently it is.

I e-mailed AA directly figuring that it anyone would know they would and they replied back to me.

Oh they most definitely do know - but they ain't sharing.

( NFL Football - "C'mon man!!!" ) lol

So . . . . do any of you happen to know???
 
You can easily check the twist rate with a cleaning rod, a felt tip pen, and a ruler. Make sure all the fittings on the rod are tight. Insert the rod with a tight fitting patch about an inch into the barrel. Make a mark on the rod with the felt tip pin which aligns with some feature on the barrel or chamber. Carefully push the rod into the gun until a turn completes (or a half turn, or a quarter turn). Again mark the rod. Remove the rod and measure the distance between the marks. Do the math as necessary to get the rate of twist.
 
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AA were using LW barrels so here is the LW sight with the barrels and twist. May not help but as mention you can check any barrel twist with some effort. AA may spec their barrels out t, that is if they are using the LW barrel but the cost for a seperate line for AAA barrels would bring the price of the barrels up vs std production. Just SWAG.💀

https://www.lothar-walther.com/gun-barrel-blanks/airgun-barrels/?p=1
 
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The twist rate with cleaning rod method (yes, with ball bearings in handle) often shows inaccurate results because even though it seems the Jag (patch holder) is tight, it often unscrews a bit as its pushed in, then tightens back up as its pulled out. Normally the error gives the impression the twist rate is slower then the real rate. The method improves if the patch is screwed onto the rod tip when it extends thru the muzzle, then the marked rod is PULLED back out as the mark rotation is observed. I've tested lots and lots of barrels.

Frankly, there seems to be no important difference in pellet performance with small changes in twist rate .... most airgun barrels are around 14.5" to 17.5" rate, and they perform about the same if they are well made. Recently, Lothar Walther is offering much slower twist rates, like 27" or so, and they also seem to perform nearly the same, with perhaps a small improvement with light pellets at longer range.
 
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