Hunting Washington Forum

Equipment & Gear => Guns and Ammo => Topic started by: Eric M on February 28, 2017, 05:20:16 PM

Title: stabilizing a 69 grain bullet
Post by: Eric M on February 28, 2017, 05:20:16 PM: Curious what you guys think about shooting a .223 with 69 grain bullets with a twist in 9 barrel. Would a twist in 8 be better? Just curious.
Title: Re: stabilizing a 69 grain bullet
Post by: bobcat on February 28, 2017, 05:34:30 PM: Try this twist rate calculator:

http://www.bergerbullets.com/twist-rate-calculator/
Title: Re: stabilizing a 69 grain bullet
Post by: Karl Blanchard on February 28, 2017, 06:44:12 PM: Funny you posted this. I literally just ran some 75gr Horn BTHP Match out of my 9 twist AR today after work. A 7 or 8 twist is probably more ideal but if you have a 9 already don't be afraid to push em hard. They will shoot. I also shot some in my 14 twist 22-250 and they also shot well. What you lack in twist, you can counter with speed.
Title: Re: stabilizing a 69 grain bullet
Post by: Eric M on February 28, 2017, 06:48:54 PM: Quote from: bobcat on February 28, 2017, 05:34:30 PM
Try this twist rate calculator:

http://www.bergerbullets.com/twist-rate-calculator/
Thanks!
Title: Re: stabilizing a 69 grain bullet
Post by: jasnt on February 28, 2017, 06:49:16 PM: Mine loves the heavies but it's a 1:7
Title: Re: stabilizing a 69 grain bullet
Post by: Eric M on February 28, 2017, 06:51:18 PM: Quote from: BLRman on February 28, 2017, 06:44:12 PM
Funny you posted this. I literally just ran some 75gr Horn BTHP Match out of my 9 twist AR today after work. A 7 or 8 twist is probably more ideal but if you have a 9 already don't be afraid to push em hard. They will shoot. I also shot some in my 14 twist 22-250 and they also shot well. What you lack in twist, you can counter with speed.
Some of the Sierra load data I was looking at said up to 73 grain BT for the twist in 9. Thanks for the response. We'll see what happens.
Title: Re: stabilizing a 69 grain bullet
Post by: Wanttohuntmore on February 28, 2017, 08:24:24 PM: Thanks for the info BLRman, this helps me with some of my ar plans.
Title: Re: stabilizing a 69 grain bullet
Post by: Karl Blanchard on February 28, 2017, 08:55:01 PM: Quote from: Wanttohuntmore on February 28, 2017, 08:24:24 PM
Thanks for the info BLRman, this helps me with some of my ar plans.
What are you looking to slap together? I'm not a big gas gun guy but there are too many .223 in the stable so one is getting a new grendel upper soon I think.