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View Full Version : .223 62 GR bullets in a 1:12 barrel?


Whitesmoke
02-16-2007, 4:58 AM
Has anyone tried this? The reason I ask is I just got a original M16 A1 upper with a 1:12(i think....) chrome lined barrel.....and my other AR and my whole stock pile of ammo is ss109 62 gr bullets. I don't want to have seperate ammo for this one...I want them both to shoot the same stuff.

ocabj
02-16-2007, 6:31 AM
No, 1 in 12 is too slow for 62gr. See the Ammo Oracle FAQ for detailed information regarding this issue and how the military addressed it.

classical_buff
02-16-2007, 1:39 PM
1:12 is great for 40-52 gr bullets.
1:9 is more suitable for 52-69 gr bullets.

I thought (I could be wrong on this) currently the US military was using 1:9 barrel twist with 62 gr bullets instead of 55 gr.

ocabj
02-16-2007, 1:45 PM
Military has been using 1 in 7" for awhile.

sargenv
02-16-2007, 4:47 PM
Oddly enough, I used to fire 64 gr Winchester power points from a TC Contender and I believe (someone correct me if I'm wrong) that it had a 14" 1 in 12" barrel. I didn't notice any degradation in accuracy at the longer distances. If it's what you have, load up or buy a few and see how your barrel likes them, if accuracy suffers, shoot the light stuff, if you can't tell the difference, well, go for it.

Vince

Whitesmoke
02-16-2007, 8:41 PM
Thanks for the replies...I'll try a few and see how they work. If they shoot like a mini-14 I'll rebarrel it..lol.:D

I just want all my defense type weapons to shoot the same stuff...and I already have a boat load of 62's....

NRAhighpowershooter
02-16-2007, 9:06 PM
62's in a 1-12" will shoot worse than a mini-14... you'll get perfect keyholes at 25yds..... :eek:

Whitesmoke
02-16-2007, 9:28 PM
62's in a 1-12" will shoot worse than a mini-14... you'll get perfect keyholes at 25yds..... :eek:

Thats what I'm afraid of....lol. No big deal...I can sell the barrel easy enough and buy another to rebarrel it. I just really wanted an A1 type example in my collection. ...so I still needed the upper reciever anyways.

sargenv
02-16-2007, 10:35 PM
I keep hearing this but I'm unconvinced till I see it for myself. 62's aren't really that much longer/heavier than 55's. If we were talking 69's or heavier then I'd concede, but I can't believe that 7 gr of bullet weight will make all that much of a difference. If I'm wrong and it won't fire em so be it, but I still say load a few and see what's up..

And um, only the stock Mini's suck pond scum when it comes to accuracy. I had my mini rebarreled to a 1 in 8" twist and a .85" Diam barrel with the larger gas block and it keeps up with AR's all day handily. It's fired everything I've loaded for it from 50 gr soft points up to 75 gr Hornady match bullets.

Vince