Air gun twist rate

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Hateful McNasty

Hateful McNasty

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May 28, 2020
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L.A (lower Alabama), United States
A member asked about the twist rate of a gun. So nothing better to do i checked 2 of my .22 springers and each was 1 in 22+/- close enugh...lol

So looking around not much said or posted on this to compare to or whats " normal"

In looking i found this at hard air mag..

"Although I have no concrete proof (yet), and there may certainly be exceptions, I think that perhaps the same criteria can be used for pellet twist rate. This could apply to the majority of airgun pellets.

If their shape is such that they are truly “Drag Stabilized”, then why not spin them slowly, like a roundball? In addition to the twists rates given above for roundball, that would mean about an 18 inch twist for a .177 cal. pellet, about 22 inch for a .22 cal. and about a 25 inch twist for a .25 cal pellet.

Such slow twist rates would minimize aerodynamic jump, and decrease the likelihood of spiraling. The high drag pellet would still see an increase in gyroscopic stability as it travels downrange."

So now got to wonder if that is a standard practice used in calibers barrels as hard air discribed above.

I dont have a rod for .177 so .... But 22 was easy to determine ..

So anybody got nothing better to do list you gun- caliber, and rate like a data base or a comparison..
 
18.13 said:
.30 Maverick 1/37 shoots the 50gr and the Hades great. Definitely not a slug shooter
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In black powder there's talk about projectiles grom ball to long heavy bullets used in twist rates on them and got to wondering if that could be applied to slugs in air guns/ pcp. It kinda would make sense . Like powder charge (fps) to twist for shape size and weight..
 
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FX liners the superior heavy liners are for heavy slugs
Screenshot_2021-01-20-19-58-44.1611190789.png


Screenshot_2021-01-20-19-58-44.1611190789.png
 
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With out looking ot seemeds the same the longer heavy projectile a slow Rate.

That chart kinda follows that.

For fun i put my .22 springer stuff in this and shows stable..lol
bergerbullets.com

Twist Rate Stability Calculator

Our newly updated Twist Rate Stability Calculator not only tells you what your SG is, but it also lets you know if you are reaching your optimized BC.
bergerbullets.com bergerbullets.com

image11.png
 
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SteveP-52 said:
While not a clue on others, I did email Weihrauch asking this question and their reply was all their rifle barrels, springer and pcp, have a 16:1 twist rate.
Maybe email the companies whose guns you'd like to know about and ask what theirs are?
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Have you checked that woth a cleaning rod and the rate of one of yours? ..

Pretty much what im asking here. Grab you gun and hands on measure the rate yourself .. i dont have a .177 rod to check them true. Like said .177 should be faster luke 1 in 16-17 where a .22 is around 1 in 20-22
 
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Well steve i checked the r9- hatsan. 22 and its 1-16 as well.. i did not do it earlier on guns i just cant quick uncock.. and m pur of .22 to fire them ..lol😭

But ya, in .22 1 in 16 looks good rate as well..

Anyway i was wondering between brands and models if they use a standard or what. Do all gamos use 1 in 22 and 177 or in .177 its different ? Do all hw use 1-16 in all guns made barrels? The diana / rws? Ect...
 
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Mo-Ron said:
Well steve i checked the r9- hatsan. 22 and its 1-16 as well.. i did not do it earlier on guns i just cant quick uncock.. and m pur of .22 to fire them ..lol😭

But ya, in .22 1 in 16 looks good rate as well..

Anyway i was wondering between brands and models if they use a standard or what. Do all gamos use 1 in 22 and 177 or in .177 its different ? Do all hw use 1-16 in all guns made barrels? The diana / rws? Ect...
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What's standard? Don't honestly know and why I suggested emailing different companies and see if they'll tell you what the twist rates in their barrels are.
HW, yes like I said in my post. I emailed them to ask. Their reply was that all their barrels for both springers and PCP all have a 16:1 twist rate.

I'm the kind of person that if I want to know something, I don't just take for granted what I read on forums and I belong to a few both here and in the UK. If I want to know something, I go straight to the source, who should know better than anyone about their product. I've only gotten 2 so far that dodged and said stupid stuff like "That's proprietary information".
 
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SteveP-52 said:
What's standard? Don't honestly know and why I suggested emailing different companies and see if they'll tell you what the twist rates in their barrels are.
HW, yes like I said in my post. I emailed them to ask. Their reply was that all their barrels for both springers and PCP all have a 16:1 twist rate.

I'm the kind of person that if I want to know something, I don't just take for granted what I read on forums and I belong to a few both here and in the UK. If I want to know something, I go straight to the source, who should know better than anyone about their product. I've only gotten 2 so far that dodged and said stupid stuff like "That's proprietary information".
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Then get " that's a trade/ company secret". ..lol.

Thing is for the size, shape , volisity, and weight that ywist will make a difference..
Id think more in pcp when picking a best slug.

Then the springers that uad the 1-16 were not as strong a gun as the "magnum" are at 1-22..

In pellets you got to kinda assume when they develop the guns common everyday type pellets wete used for the R&D .

So the slower the fps could mean s tighter twist in that? Ya know a 700+/- fps gun more likley to have a 1+16. Over 800+ fps gun?.

With a pcp youd regulate the power to the projectile/ slug for the barrel twist in it for greater consistent shots?

I dont know you see it with pb / bp reloaded s and shooters but got to think it could apply in air guns as well..

"The barrel of your firearm must put adequate spin on projectiles to properly stabilize the bullets you’re shooting.

In general, a longer bullet requires a tighter rate for sufficient flight stability. Because heavier bullets are naturally longer, if you’re shooting a projectile with a heavier grain weight, you’ll want to shoot it from a barrel with a faster twist rate. A slower rate may produce slightly less pressure and deliver slightly better accuracy when paired with lighter projectiles in each caliber."

Well im going over my head on this and air guns .. lol..

Just figured guys with crosman or any brand i dont have in springers or whatever just post the twist and n thete guns to compare for fun and the know.
 
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Ya, just the chart posted from FX on the barrel offerings . You got to assume the projectile used factors .. a competition guy going to use this , in that with this to get the best result.. this gun set for this perssure with this slug qnd that barrel and twist. Then sticks with it. Just kinda makes sense .. if i perfer long heavy slugs i use that twist if short stubby lite then that twist.. a giy has the sit on the bench and sling lead and find yhat perfect balance for the win...lol
 
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