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Does the 1:12 twist in a 16" barrel have any issues stabilizing the heaver bullets like the 150gr?
1:12 twist and 150gr bullets
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I believe it would, 130 Nosler OK.sharpshooter33 said:
The 150 eats up so much case room there isn't much left for powder, it would be so slow it would not expand.
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Not saying I want to shoot the 150s all the time. Just wondering on the changes in the twist from 1:10, 1:11 and now 1:12. What weight would the 1:12 start to not stabilize? I'm looking to have a barrel built, but not sure on twist rate yet. I'm figuring on using 115gr area mostly, but if as technology often does they start making a heavier bullet that can be loaded in the 6.8 I'd like to be at least able to shoot it without having ovals at 100yards.
I'm assuming the move from 1:10 to 1:12 was to ease pressure since they are dealing with faster powders, but I like to keep and idea of what I'm giving up when I decide which way I'm going. If I can still push out 130 grainers without issue that may be enough for me to decide to go 1:12. The 5.56 started out around 12 then went to 7 and back to 9 then settled down around 1:8 if I remember my history right. Doesn't mean that 7,9 and even 12 don't shoot 5.56. It just that there will be a better twist for all around choices of bullets in that calibre.
If I was shooting 40gr in 223 then I might want a 1:12, but if I wanted to shoot 55gr to 80gr I'd probably have 1:8
Just coming from a 308 and 223 world the 1:12 seems a little slow and I'm looking to see if it will fit my long term needs for this barrel. Seems that most focus here has been on 80gr to 115gr recently. I'm just looking for some answers to the question if I decided to shoot some 130gr to 150gr aside from bullet length would my barrel stabilize the bullet with 1:12?
I'm assuming the move from 1:10 to 1:12 was to ease pressure since they are dealing with faster powders, but I like to keep and idea of what I'm giving up when I decide which way I'm going. If I can still push out 130 grainers without issue that may be enough for me to decide to go 1:12. The 5.56 started out around 12 then went to 7 and back to 9 then settled down around 1:8 if I remember my history right. Doesn't mean that 7,9 and even 12 don't shoot 5.56. It just that there will be a better twist for all around choices of bullets in that calibre.
If I was shooting 40gr in 223 then I might want a 1:12, but if I wanted to shoot 55gr to 80gr I'd probably have 1:8
Just coming from a 308 and 223 world the 1:12 seems a little slow and I'm looking to see if it will fit my long term needs for this barrel. Seems that most focus here has been on 80gr to 115gr recently. I'm just looking for some answers to the question if I decided to shoot some 130gr to 150gr aside from bullet length would my barrel stabilize the bullet with 1:12?
zoomie said:
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My 13 twist shoots the 130 Sierra or 130 Speer fine, it does not like the 120 barnes solid.
I have not shot any 130s in my new 12 twists but I am sure they work since they work in the 13.
BTW my 308s a 13 twist Krieger and shoots 168s or 155 lapuas just fine too but, it takes the 11 to get accuracy from the 175s.
I have not shot any 130s in my new 12 twists but I am sure they work since they work in the 13.
BTW my 308s a 13 twist Krieger and shoots 168s or 155 lapuas just fine too but, it takes the 11 to get accuracy from the 175s.
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Thanks!
The 1:12 sounds like it will suit my needs.
My 308 bolt gun is a 1:12 if I remember right(been awhile since I've shot it) shoots the 155 and 168 great. Shot the 175 ok, but that felt like stretching it. They never produced the results of the 168's even though I liked the 175s better.
But that was many years ago when I had time to shoot all the time.
The 1:12 sounds like it will suit my needs.
My 308 bolt gun is a 1:12 if I remember right(been awhile since I've shot it) shoots the 155 and 168 great. Shot the 175 ok, but that felt like stretching it. They never produced the results of the 168's even though I liked the 175s better.
But that was many years ago when I had time to shoot all the time.
constructor said:
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I fired some 150 grain round nose from my 16 inch 1 in 10 twist and they were pretty accurate.
I was up to 1950 fps when I ran our of test bullets.
If you could get them to feed reliably they would be good for supressed work at lower velocities.
I was up to 1950 fps when I ran our of test bullets.
If you could get them to feed reliably they would be good for supressed work at lower velocities.
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