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Twist rate for 9mm

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Twist rate for 9mm Empty Twist rate for 9mm

Post by noylj Wed Nov 13, 2013 1:04 am

Has anyone worked at barrel twist rate to improve accuracy of 9x19?
I was wondering 'cause I have never read any articles about a study of twist rates for handguns. They all seem to be somewhere if the 1:10 to 1:16, and I have often wondered if the twist rates had ever been "optimized."

noylj

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Post by Hornet1 Wed Nov 13, 2013 8:05 am

Everything I have read says a 1:32 KKM barrel is the way to go with 115gr jacketed bullets.  NSK used to post to the old list a lot.  He has a wealth a knowledge on the 9mm.  Wish he would post here.

Mac

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Post by DeweyHales Wed Nov 13, 2013 11:41 am

I have had several 9mms built using KKM Precision 1:32 twist barrels.  Each has been absolutely awesome.
DeweyHales
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Post by Dr.Don Wed Nov 13, 2013 1:19 pm

Dewey,
I've seen your hardball load posted over in the other section.  Do you have a successful softball load with this barrel?
Dr.Don
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Post by DeweyHales Wed Nov 13, 2013 4:51 pm

No, I don't have a softball load. The load I use doesn't seem that bad unless you shoot it a lot. It's no where near the snap of a Power Pistol load. If it seems hot, try going up on the recoil spring. 

Pistol powders are temperature sensitive. The powder charge needed in the early spring and fall would be excessive at Perry on a hot July day. 

I can tell you from experience that shooting the Beretta too much will lead to tendonitis and elbow pain much the same as 45 hardball loads. The key is moderation and enough recoil spring.
DeweyHales
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