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Joined: Jan 2009
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Looking to purchase a ruger .223 for varmint hunting. They offer it in 1:9 twist or 1:12 twist. In what applications is one better over the other?
Thanks
MWC
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Campfire Outfitter
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Campfire Outfitter
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The 1:9 twist is better if you plan on shooting heavy bullets (better for long range varmint shooting), and the 1:12 twist is better for lighter bullets (smaller, faster bullets can be more destructive on close to medium range varmints). I would say that if you are shooting inside of 400 yards, get the 1:12 twist barrel.
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Campfire Tracker
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I'd go 1 in 9 for the heavier hunting bullets besides varmint bullets. Particularly in a factory offering I do not see the twist rate affecting accuracy and I do know a 1 in 8 twist can sling light 50 gr. V-max's into very tiny clusters. FWIW.
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Campfire Kahuna
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Campfire Kahuna
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I have gotten excellent accuracy from 40-grain Nosler Ballistic Tips in a 1-9 twist, in more than one rifle. It's very versatile.
Last edited by Mule Deer; 01/08/09.
“Montana seems to me to be what a small boy would think Texas is like from hearing Texans.”
John Steinbeck
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Campfire 'Bwana
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Campfire 'Bwana
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I'd do the 1:9, no question. The 1:12 will limit you quite a bit with bullets much past 55 grains. I've got good groups from my .223 AR with a 1:9 using 35 grain Hornadys Vmax'es in addition to the 40 and 50 grainers. My favorite bullet in the .223 is the Sierra 69 grain BTHP and do not believe it would shoot very well in the 1:12. My Cooper is a 1:14 and it will not shoot the 69's worth a hoot, so I doubt the 1:12 would do much better. The 1:9 will just give you a much more versatile rifle.
We may know the time Ben Carson lied, but does anyone know the time Hillary Clinton told the truth?
Immersing oneself in progressive lieberalism is no different than bathing in the sewage of Hell.
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I agree with these guys, but by the same token, I have fired hundreds of rounds out of my -250 at gophers, coyotes, targets, etc, with a 1:12" and have never fired a bullet larger than 55gr through the rifle. So I guess it just depends on what you will be using your rifle for.
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LIke most of the others said: I'd go with the 1 in 9 twist. I have a Savage with that twist, and it shoots everything from 40 gr Ballistic Tips and V-Maxs to 69 gr Sierras (the heaviest I have tried) into groups that hover around a half-inch or less. I have a CZ-527 American with the 1 in 12 twist, and it is also very accurate - but only with bullets 55 gr and under. It will not shoot the 60 gr Powerpoints or Nosler partitions well at all.
�That rifle on the wall of the labourer's cottage or working class flat is the symbol of democracy. It is our job to see that it stays there.� George Orwell
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Not replying to anyone, just a general question on this. Will a 1-12 twist 223 shoot bullets in the 60 grain range accurately? A little slower powder? It seems that if the 1-9 twist will shoot the lighter bullets as well as the heavier then the 1-12 ought to be able to go a little higher than 55 grains but I haven't heard of it so far. I'd like to give it a try with my 1-12 but don't want to waste the money on heavier bullets if it's a given that accuracy is unlikely. If the 1-9 will do it all with accuracy there dosen't seem like much reason for the 1-12 to survive in the long run.
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Campfire Kahuna
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Campfire Kahuna
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I can tell you that a 1-14", won't do schit with anything much over 50 gr.
At 60ish, the 12 twist is at the end of it's rope.
The 9 twist should get you to the upper 60s to 70ish, easily.
I'd prefer an 8-twist, or even a 7, but 9 will work. Damned well better, as I just put one of those new Kimber Montana .223 1-9" twists on order.
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Campfire Kahuna
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Campfire Kahuna
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43,
A 1-12 will be somewhat marginal with 60-grain bullets. A lot depends on the bullet, of course (some bullets in that weight range are longer than others) but too often I have found that I really have to lean on some 60's to get them to stabilize in a 1-12--one reason I don't buy any .223's with anything but a 1-9 (or faster) anymore.
“Montana seems to me to be what a small boy would think Texas is like from hearing Texans.”
John Steinbeck
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Campfire Member
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Nosler says 1-10 min. for the 60gr BT's.
The only thing wrong with the 270....Its not a 25-06.
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Campfire Ranger
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Campfire Ranger
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I'd get a rifle twisted 1-14 for up to 52 grs., and a 1-9 for up to the 75 A-Max.
Covers all bases of varmints 4 me (grins).
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Campfire Outfitter
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Ok fellas, question.
Twist is one thing, now up the velocity.
How does this sound...75-80gr A-Max...
.223 Remington 1:7
22-250 Rem. 1:8
223 WSSM 1:9
22x57 0r x284 1:10
Where 1:7 may be to fast a twist at 3500 it would be fine at 2700?
Any comments....trying to learn.
I am the way, the truth, and the life: no one comes to the Father but by me. John 14:6
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Campfire 'Bwana
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Campfire 'Bwana
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If you know the length of the longest bullet that you're going to shoot, you can run the Greenhill Formula and calculate (roughly) the optimal ROT.
T = (150x(DxD))/L
D = diameter of bullet in inches
L = length of bullet in inches
T = rate of twist in inches
T = (150x(.224x.224))/L
T = (150x(.050176))/L
T = 7.526/L
Jeff
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Wondering the same thing. Don't know how or if it would apply to the specific bullet weights and twists you mentioned but Mule Deer's post here seems to say velocity can make some difference when shooting a marginally heavier bullet in a slower twist rifle. Hopefully I'm not misinterpreting or taking what he said out of context, "too often I have found I really have to lean on some 60's to get them to stabilize in a 1-12."
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Campfire Regular
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I am just starting to work up a Tikka T3 .223 with an 8" twist and so far it shoots 55 and 60 gr. bullets better than my previous .223, A CZ with a 12" twist. Go with the 9".
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Campfire Regular
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Not replying to anyone, just a general question on this. Will a 1-12 twist 223 shoot bullets in the 60 grain range accurately? A little slower powder? It seems that if the 1-9 twist will shoot the lighter bullets as well as the heavier then the 1-12 ought to be able to go a little higher than 55 grains but I haven't heard of it so far. I'd like to give it a try with my 1-12 but don't want to waste the money on heavier bullets if it's a given that accuracy is unlikely. If the 1-9 will do it all with accuracy there dosen't seem like much reason for the 1-12 to survive in the long run. My 1 in 12 Model 70 will put 60gr Partitions in one ragged hole all day long. With a Featherweight barrel too.
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Campfire Ranger
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That bullet is one goofy shooter. If your gun likes it, you are lucky!
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Campfire Kahuna
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Campfire Kahuna
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Yeah, velocity makes some difference as well. This is why the "standard" twist rate for the .22-250 for years was 1-14, while it was 1-12 for the .223.
The Greenhill Formula was devised long ago, and while it works pretty well some people suggest that the constant 150 should be 180 at muzzle velocities over 3000 fps. There are other, more complex formulas today that take all this into account.
“Montana seems to me to be what a small boy would think Texas is like from hearing Texans.”
John Steinbeck
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Campfire Oracle
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Campfire Oracle
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too often I have found that I really have to lean on some 60's to get them to stabilize in a 1-12--one reason I don't buy any .223's with anything but a 1-9 (or faster) anymore. As mentioned here and other posts, the 1 in 9 is more versatile, so my vote is going there too...  I shoot .223s more than all my other rifles put together, and the tighter twist really wakes up with a 68 or 69 gr.match bullet for longer range PDs. The opening post was about a Ruger... get the 1 in 9 in your choice. If you don't mind a med. heavy gun, look at their new "Predator", it is really cool IMO Ingwe
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