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Well I finally got my form 1 SBR stamp. Now to build/buy an SBR upper.

I have found a couple of uppers for sale, but they aren't exactly what I want. So it's either buy one, take parts off and replace with what I really want or build from scratch.

On building from scratch, that brings me to the question. Would a 1X8" twist in a 10.5" barrel stabilize a heavy 75gr bullet good enough not to worry about baffle strikes?

One of the barrels I'm looking at is a Faxon barrel. It's a 10.5" 5.56X45mm with a 1X8"twist.

I know that the 1X8" twist in a longer barrel is more than good enough to stabilize heavy bullets up to 90gr in a 20" barrel, I'm just wondering if it's good enough in the shorter length.

The other one I'm looking at is a 1X7" twist. I'll mostly be using 55gr at the range, but the 75gr bullet would be used for home defense.

Any thoughts would be appreciated.

ARman
 
Posts: 1636 | Registered: May 19, 2010Reply With QuoteReport This Post
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I've got that exact 1x8 10.5" barrel. I've shot some 75gr bullets through it while it was wearing my form 1 can. No issues.

I'm pretty much in love with Faxon barrels for that price point.




Train how you intend to Fight

Remember - Training is not sparring. Sparring is not fighting. Fighting is not combat.
 
Posts: 7193 | Location: Alpharetta, GA | Registered: August 04, 2005Reply With QuoteReport This Post
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quote:
Originally posted by myrottiety:
I've got that exact 1x8 10.5" barrel. I've shot some 75gr bullets through it while it was wearing my form 1 can. No issues.

I'm pretty much in love with Faxon barrels for that price point.



That's good to know. I figured that it would be good enough, but being short made me think.

I have see bullets not stabilize enough because of low velocity.

Since this will wear a "can" sometime in the near future. I didn't want to take a chance with baffle strikes.

I'll be putting in the order soon for the Faxon barrel.

ARman
 
Posts: 1636 | Registered: May 19, 2010Reply With QuoteReport This Post
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Picture of myrottiety
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quote:
Originally posted by ARman:
quote:
Originally posted by myrottiety:
I've got that exact 1x8 10.5" barrel. I've shot some 75gr bullets through it while it was wearing my form 1 can. No issues.

I'm pretty much in love with Faxon barrels for that price point.



That's good to know. I figured that it would be good enough, but being short made me think.

I have see bullets not stabilize enough because of low velocity.

Since this will wear a "can" sometime in the near future. I didn't want to take a chance with baffle strikes.

I'll be putting in the order soon for the Faxon barrel.

ARman


I will say that the can is a .30 caliber can. So it's got a little extra "wiggle room" so to speak. But looking at targets there were no key holes or symptoms of under stabilization.




Train how you intend to Fight

Remember - Training is not sparring. Sparring is not fighting. Fighting is not combat.
 
Posts: 7193 | Location: Alpharetta, GA | Registered: August 04, 2005Reply With QuoteReport This Post
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I will be building/using a .30 caliber can also. I'm hoping to get my form 1 stamp for the suppressor soon.

Thanks for the information, I just want to get as much information.

ARman
 
Posts: 1636 | Registered: May 19, 2010Reply With QuoteReport This Post
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