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Joined: Sep 2007
Posts: 964
Campfire Regular
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OP
Campfire Regular
Joined: Sep 2007
Posts: 964 |
I have a TC compass bolt action rifle that is 22 inches long with 1/9 twist. What is my bullet weight range between 300-400 yards? Some say this twist is to fast to stabilize bullets over 70 grains past 200 yards. Thanks
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Joined: Jan 2012
Posts: 708
Campfire Regular
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Campfire Regular
Joined: Jan 2012
Posts: 708 |
My .223 9 twist likes 60 grain VMAXs. I hand load them and have had the best luck with the 55 Sierra Blitzking and 60 VMAX. 60 Horn SP is very close to the VMAX as well.the 9 twist will stabilize the 69 tipped match king. I plan to try the 65 Sierra SBT and 62TSX eventually. I’ve used the 50 VMAX, 52 Horn Match HP, 55 VMAX, 60 VMAX and 60 Horn SP.
52 Match HP was good but like shooting a FMJ on critters.
Black Hills loads the 60 VMAX and that’s what I started with to get brass and now I reload.
Isaiah 6:8
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Joined: Dec 2008
Posts: 78,300
Campfire Oracle
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Campfire Oracle
Joined: Dec 2008
Posts: 78,300 |
Some say this twist is to fast to stabilize bullets over 70 grains past 200 yards. Thanks First time I've ever heard anything like that.....
"...the left considers you vermin, and they'll kill you given the chance..." Bristoe
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Joined: Jan 2012
Posts: 708
Campfire Regular
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Campfire Regular
Joined: Jan 2012
Posts: 708 |
OP, I think you mean the twist isn’t fast enough to stabilize over 70. The weight of the bullet matters less than the length of the bullet. Other factors such as altitude also play in. Some bullets might stabilize but longer bullets of same weight might not.
Isaiah 6:8
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Joined: Jan 2009
Posts: 1,018
Campfire Regular
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Campfire Regular
Joined: Jan 2009
Posts: 1,018 |
Bullets have a habit of "liking" certain RPM ranges. You can make up for a twist that is a bit slow by increasing velocity, thereby gaining RPM.
That said, I have a Savage BVSS that likes 70's and it's a 9 twist. looking to try 85- 90 at around 2800.
HM
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Joined: Nov 2017
Posts: 322
Campfire Member
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Campfire Member
Joined: Nov 2017
Posts: 322 |
I shoot 77SMKs just fine through a 1/9 twist. Generally outto 300 yds and shoot 75 Amax out to 600 yds. Using a Remington 5R boltgun to shoot up my huge supply of HP match loads. When done, I’ll move down to a lighter Bullet.
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Joined: Oct 2013
Posts: 18,914
Campfire Ranger
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Campfire Ranger
Joined: Oct 2013
Posts: 18,914 |
What are you wanting to use the rifle for, targets or critters?
For that 300-400 yard range I would want something like a 53 grain Varmageddon or V-Max. Better velocity than a 55 and both of these have a very good B.C. This would be for critters of course.
For paper punching I would lean towards something a bit heavier but that's just me.
Last edited by 10gaugemag; 02/25/20.
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