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What grain cartridge...
Posted on 6/4/20 at 8:54 pm
Posted on 6/4/20 at 8:54 pm
should i look for with AR 223 1/7 barrel?
8
Posted on 6/4/20 at 9:01 pm to SwampdogDC
1:7 gives you a wide range of choices.
With that fast you could easily go up to 90 grain bullets. And the good thing is 55 is just fine as well.
68 grain is a good medium.
With that fast you could easily go up to 90 grain bullets. And the good thing is 55 is just fine as well.
68 grain is a good medium.
Posted on 6/4/20 at 9:09 pm to SwampdogDC
What are you planning to use it for??
Posted on 6/4/20 at 9:34 pm to TigerOnThe Hill
Do some mid range shooting, might deer hunt with it as well. And eventually the self defense.
Posted on 6/4/20 at 9:42 pm to SwampdogDC
Optimally, about 69 or 70, but you're fine down to 55 and the sky is the limit for 1:7.
Posted on 6/4/20 at 9:52 pm to SwampdogDC
55 for training and 70 or 77 for hunting is what I've always done.
Posted on 6/4/20 at 9:58 pm to ChatRabbit77
Thanks for the responses,
Posted on 6/4/20 at 10:19 pm to SwampdogDC
I challenge anyone to notice the difference when shooting....
Posted on 6/4/20 at 10:43 pm to SwampdogDC
My old colt 1:7 rifle loved 55gr loads and spread 77's all over the place, so dont put too much stock in what it's supposed to like. Just go try it. As a general rule I like heavy for caliber bullets for hunting and light for caliber bullets for self defense.
Posted on 6/5/20 at 6:57 am to X123F45
My 223 shoots 68g significantly more consistent than 55g
Posted on 6/5/20 at 1:15 pm to SwampdogDC
quote:
My old colt 1:7 rifle loved 55gr loads and spread 77's all over the place, so dont put too much stock in what it's supposed to like.
Good point. A friend of mine has a 1:7 twist barrel the doesn't behave typically either. He shoots 45 gr bullets for prairie dog hunting and 55 gr bullets for deer hunting. His also won't handle heavy bullets well, despite the fast twist. Ultimately, the gun will actually tell you it wants to shoot.
Posted on 6/5/20 at 10:36 pm to SwampdogDC
1:7 should shoot damned near anything. It can handle and spin the longer bullets that come with higher grain weights. Ultimately, your particular rifle is going to like one type of bullet better, (though it may or not be noticable) but it should shoot almost anything just fine. Logically, though, the 1:7 twist is what the military uses in the M4 these days and I think goes all the way back to maybe the second or third iteration of the M16 and it has to be able to deliver the 55 grain ball round and the 62 grain penetrator round. That's going to cover like 98.34% of all the rounds you're going to encounter (Statistics may be lies or damned or any permutation of the three).
It also has the twist to deliver the spin required to stabilize the heavier bullets, so you should be fine if you want the heavier match rounds above 62 gr. There's a possibility that lighter specialty rounds below 55 gr might overspin and fragment, though that's a maybe. Maybe even a hard maybe. Probably a hard maybe.
My rifle is 1:7 and spits out 55 gr and 62 gr with little difference. The 55 gr puts slightly wider groups out of my rifle but honestly, below about 300 yards it isn't enough to really matter. With my AR, I'm not match target shooting and a quarter to a half inch larger pattern at 100 yards is REALLY hard to pick out from the limits of my accuracy offhand. Out beyond that, my point of aim might have to shift due to the slightly different ballistics and I might want to use the heavier rounds to keep the spread down.
It also has the twist to deliver the spin required to stabilize the heavier bullets, so you should be fine if you want the heavier match rounds above 62 gr. There's a possibility that lighter specialty rounds below 55 gr might overspin and fragment, though that's a maybe. Maybe even a hard maybe. Probably a hard maybe.
My rifle is 1:7 and spits out 55 gr and 62 gr with little difference. The 55 gr puts slightly wider groups out of my rifle but honestly, below about 300 yards it isn't enough to really matter. With my AR, I'm not match target shooting and a quarter to a half inch larger pattern at 100 yards is REALLY hard to pick out from the limits of my accuracy offhand. Out beyond that, my point of aim might have to shift due to the slightly different ballistics and I might want to use the heavier rounds to keep the spread down.
This post was edited on 6/6/20 at 2:51 am
Posted on 6/6/20 at 1:21 am to TigerstuckinMS
quote:
Logically, though, the 1:7 twist is what the military uses in the M4 these days and I think goes all the way back to maybe the second or third iteration of the M16 and it has to be able to deliver the 55 grain ball round and the 62 grain penetrator round.
The 1:7 twist is only because of the M856 tracer, which is much longer than the M855 even though they are both 62gr. When the M16A2 was undergoing development, the USMC wanted a 1:9 twist barrel because it delivered better accuracy from ball rounds. I have 1:7 and 1:9 twist AR rifles, I reload and my 75gr OTM's out of my 20" 1:9 barrel group tighter on average than my 16" 1:7. So it's more than simply twist rate and bullet weight. I know a 1:9 twist 16" barrel won't stabilize M855A1 but my 20" will just fine, 62gr bullet but much longer than M855.
Posted on 6/6/20 at 8:13 am to TigerOnThe Hill
quote:
Ultimately, the gun will actually tell you it wants to shoot.
I’ve noticed every barrel has its own individual quirks and preferences. My 1:10 barrel on my AR10 seems to shoot the 150gr stuff best when logic would say it probably prefers 165gr+ ammo. I’ve noticed the same out of some ARs with a fast twist and great accuracy with the standard 55s.
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