heavy bullets through an AR

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FARMTOFIELD

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I'm wanting to load some hunting rounds for my AR but I'm not sure what of the heavier bullets (68-80) grain that will seat to mag length? Anybody have any ideas?
 
I have some heavier bullets and will check it out and post up. Heavier won't matter if your twist rate is too numerically high. I believe a 1/10 will stabilize about a 68 grain bullet. A i/9 goes up to about 72. 1/8 maybe a 76, and 1/7 maybe 78, 80.

You will know right away. Load one up and shoot it. If the hole in the paper is not round, or inexplicably you missed the entire target, the bullet lost directional stability and began to tumble in flight, going who knows where. If you hit paper and you can see the bullet hit sideways, you are tumbling. Back off the bullet weight until accuracy is achieved.

Go loook at Nosler numbers for the 22-250, which is a 1/14 twist. Soons bullet weight goes over 60 grains they change barrels to a much faster twist.
 
We shoot 55, 62, and 64 grainers through our M4's and they're 1/7 twist. No keyholing or signs of the twist rate being to fast. A lot of people like the 60 gr Nosler Partition on deer.
 
I forgot to mention I'm shooting a 1:8 twist 20" superbull, I have a great shooting load for the 60 gr vmax and as of right now the partition is what I'm thinking about
 
I really like the 65 Sierra GKSBT with a case full of Varget or RL 15,,should be good up to 77-80 gr bullets with that barrel,,but I think the 75 Hornady BTHP and 77 SMK are the longest bullets you can load from the mag,,the 75 AMax and 80 Bergers wont
 
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tkng35 said:
1:8 twist is made for lighter rounds..!
Click to expand...

1:8 is a pretty fast twist and made for heavier/longer bullets. The higher the number means a slower twist more suitable for lighter/shorter bullets
 
I really looked into .223 bullets last year...although not for an AR but bolt gun, Savage/Stevens 200 22" 1:9 and settled in on 77gr Nosler Custom Competition OTM's. Here is one of the articles/threads I used for my decision

http://www.m4carbine.net/showthread.php ... ler-vs-SMK

They shoot fantastic out on my bolt gun and really want to try it on a smallerized doe but am always afraid that a big boy will step out and I will be under gunned. I would like to know performance because of wanting to do a build on the caliber for my daughter for next year. I dropped the crosshairs on a nice buck last year and decided not to shoot.....ethically could not bring myself to squeeze the trigger. I have always wanted to take a deer with .223 but my conscience always gets the better of me. Would be interested to know what you settle on and how they work out....oh BTW....they do a number on coyotes!
 
Mid said:
I really looked into .223 bullets last year...although not for an AR but bolt gun, Savage/Stevens 200 22" 1:9 and settled in on 77gr Nosler Custom Competition OTM's. Here is one of the articles/threads I used for my decision

http://www.m4carbine.net/showthread.php ... ler-vs-SMK

They shoot fantastic out on my bolt gun and really want to try it on a smallerized doe but am always afraid that a big boy will step out and I will be under gunned. I would like to know performance because of wanting to do a build on the caliber for my daughter for next year. I dropped the crosshairs on a nice buck last year and decided not to shoot.....ethically could not bring myself to squeeze the trigger. I have always wanted to take a deer with .223 but my conscience always gets the better of me. Would be interested to know what you settle on and how they work out....oh BTW....they do a number on coyotes!
Click to expand...

I wandered about you! What happened tothe predator sight?
 
Bullet weight isn't the issue. Bullet construction is more important. Shoot a Barnes TSX, TTSX, or a Hornady GMX and the .223 is fine for deer at modest ranges.
 

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