Gunsmithing Left hand gain twist in a gas gun?

gunsnjeeps

Retired Swab Jockey
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Dec 15, 2009
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This is kind of a @lowlight question but I'm going to field it for opinions. Can't learn if you don't ask.

I know Frank has a preference for left hand gain twist barrels, is the left twist for better recoil control?

Would the same benefits from from a left hand gain twist apply to an AR10 as a chasised bolt rifle?

Looking at Bartlein's new blend steel in a 6.5 Creedmoor 26" +2 AR10 barrel. Trying to decide if I should try the left twist if it is available.

I also just thought of a question, does a gain twist throat last longer than a standard twist given the lower starting chamber pressure?
 

__JR__

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Mar 22, 2018
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This is kind of a @lowlight question but I'm going to field it for opinions. Can't learn if you don't ask.

I know Frank has a preference for left hand gain twist barrels, is the left twist for better recoil control?

Would the same benefits from from a left hand gain twist apply to an AR10 as a chasised bolt rifle?

Looking at Bartlein's new blend steel in a 6.5 Creedmoor 26" +2 AR10 barrel. Trying to decide if I should try the left twist if it is available.

I also just thought of a question, does a gain twist throat last longer than a standard twist given the lower starting chamber pressure?
Chamber pressure Pmax is same regardless, is more relative to groove diameter/freebore diameter and 'jump'. Bullet 'start' pressure or however your want to visualize it wouldn't change that much with the rate of progression. Throat would likely last longer due to the material holding up better.

Later
 

TacticalDillhole

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  • Jun 26, 2012
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    Orlando, FL
    This is kind of a @lowlight question but I'm going to field it for opinions. Can't learn if you don't ask.

    I know Frank has a preference for left hand gain twist barrels, is the left twist for better recoil control?

    Would the same benefits from from a left hand gain twist apply to an AR10 as a chasised bolt rifle?

    Looking at Bartlein's new blend steel in a 6.5 Creedmoor 26" +2 AR10 barrel. Trying to decide if I should try the left twist if it is available.

    I also just thought of a question, does a gain twist throat last longer than a standard twist given the lower starting chamber pressure?
    I run a LH gain twist in a .260 20” bartlein. It’s a hammer.
     
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