I have a browning blr I think is 1:12 and a Remington 700sps tactical I believe is 1:9 twist rate, both 223. I'm looking for the heaviest hunting bullet I can use in them, the 1:12 rate I heard some 60 grains work still, but then wouldn't 55 grain be too weight for 1:9 twist rate?
223 twist rates need one bullet
- Thread starter bandit86
- Start date
I have a 1:9 barrel in one of my .223's and it shoots respectable groups with anything from 45, 50, 55, 69 and even 75gr. Some loads of course are better than others but all are under 1.5" groups at 100 yards. Sounds like you should buy (or load) a few different varieties and just see what kind of results you may get.
The longer the bullet is the faster the twist rate needed to stablize it. the 1-12 twist will probley stablize a 60 grain bullet now the 1-9 you should be able to stablize a 75 grain .
I was leaning toward 60 grain so I don't put too high in the browning. Too bad, I love the blr to death I wish it had a higher twist rate.
I doubt I will reload the 223, I'd rather buy some good soft points. What is the preferred coyote round?
I doubt I will reload the 223, I'd rather buy some good soft points. What is the preferred coyote round?
Sask_Hunter
CGN frequent flyer
- Location
- Saskatchewan
My rem 1-12" would spin the 60gr hornady up and the 63 gr Sierra Smp. Lenght is the issue not weight.
1-9" should get you to the 75gr A-max on the long end of things
1-9" should get you to the 75gr A-max on the long end of things
- Location
- Somewhere on the Hudson Bay Coast
I had a .222 target rifle built with a 1:7 Gaillard, that rifle shot everything well, with two exceptions. The jackets on Sierra Blitz and Hornady SXs were too thin and the bullets wouldn't make it to the target. The stubby little 52 gr Sierra MKs shot like crazy in that rifle. A 1:9 will shoot almost any .22 bullet you come across, except the heaviest TSXs which require 1:7 and the 80 gr match bullets. I'm not sure how well thin skinned Hornet type bullets would stand up to it though. With a standard 1:12 twist, the Speer 70 gr round nose shoots alright, but its only marginally stable, so thats about as long as you can go. I like fast twists though. There's not much a slow twist can do that a fast twist can't as well or better, with the exception of Hornet bullets, or maybe shooting cast. Cast bullets and fast twists are a poor combination.
So what are the tell tale signs that it works? Or doesn't? Sideways bulletholes?
Sask_Hunter
CGN frequent flyer
- Location
- Saskatchewan
Sideways bullets aren't good, I don't think the 1-12" will handle them.
I'd run 50/52 vmax/amax in the browning and the 75amax in the rem
- Location
- Somewhere on the Hudson Bay Coast
As the rate of twist drops below optimum, there is a gradual loss of stability. A bullet precesses (yaws) twice during its flight, once when it leaves the muzzle and again when it impacts a denser than air medium. The faster the bullet is rotating, the faster this yaw is corrected. With marginal stability you might see a loss of accuracy, slightly elongated bullet holes, or a lack of penetration on game, but the slower the rate of twist is below what is optimum for any particular bullet, the more dramatic the precession becomes.
Accuracy deterioration...
1:12 = 40-60ish grains
1:9 = 50-75ish grains
Generally... your results may vary and the only way to know is to test. My 1:12 would not shoot H-BTHP 68's, but these are the best in my 1:9. My 1:12 loved V-Max 55's but so does my 1:9... my experience is that the 1:9 is more forgiving over a broader range of available bullets, except the very heavy match bullets.
I have several 223's 1:12, 1:9 and 1:8 twists.
The 1:12 (Remington Varmint) gets tack driving accuracy with 50 Vmax. The Weatherby (1:12) with so far with Nosler 50 gr - still a work in progress. The Ruger Mini (1:9) with 64 gr PP. The Tikka (1:8) prefers the heavier bullets - 55 gr groups are not really that impressive.
The 1:12 (Remington Varmint) gets tack driving accuracy with 50 Vmax. The Weatherby (1:12) with so far with Nosler 50 gr - still a work in progress. The Ruger Mini (1:9) with 64 gr PP. The Tikka (1:8) prefers the heavier bullets - 55 gr groups are not really that impressive.
Are all the mini-14s 1:9 or can they be had with different twist. Just asking.
hometownhero
CGN Ultra frequent flyer
- Location
- Toon Town, Sk
with my 1:9 I run 40gr up to 77gr with no problems. For the 1:12 I would stick with something 60gr or lighter but 60 as a max
