Having a 300 blkout bolt gun built just wondering where y’all are getting the short barrel blanks or are you getting a longer barrel and having them cut down to size?
- Thread starter Biggie1976
- Start date
Cut down....I don't know of any bolt gun short blanks.....
That’s what I figured. That’s why I asked. I appreciate the response
If I was building a 300blk bolt gun I'd be using this barrel and having my Smith contour and chop to whatever size I wanted.
Unfortunately they are out of stock like most everything else these days..
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www.gmriflebarrel.com
Did that say 63 bucks?
Sure does. It's a gunsmith blank that needs contoured. I've used and shot MANY of these. Shoot great.
Dang. That would be the ticket. I’m not against buying a regular blank just didn’t know if y’all know a place that had them at 16 already. Thanks again for the information
Mine will be for supers
I’m wanting a 1/7 for this build
I will shoot the 110s also. Think I need a different twist?
Thank you for the info. The Barnes 110 tac is what I’ve loaded and are shooting in my ARs.1:7" is required to stabilize heavy subsonic bullets. It will overspin a super sonic light bullet. Which really isn't an issue except you will hit pressure faster and as a result have a slower velocity.
Check out Bergers stability calculator. I don't know what bullet you intend to shoot but a Barnes 110 TAC TX is .875" without the plastic tip. 1.175 with. For stability purposes you need to go off the all metal length. The plastic tip doesn't factor into bullet length for stability purposes. It gives a false length. If you pick a twist rate that still stabilizes your bullet weight/ speed/ altitude but is on the slower side you can maximize velocity. If you use a way-safe overspin twist rate you will sacrifice speed. Look at Wilson's 300 HAMR twist rates. 1:12" and 1:13". Same bullets.
But beware, if you go 1:8" or slower you will never be able to shoot subsonics. They won't stabilize.
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
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Agreed. I have a grendel as well and love the gun and round. Got a couple of AR10s in 308. One is 16 inch barrel and finishing a pistol build now with a 12 inch barrel.
Also to add My blkout pistol is 1/8 twist and my blkout rifle with 16 inch barrel is 1/7. Both AR platform
