coyotezapper
Well-Known Member
Freebore and lead angle.
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DCAN
Well-Known Member
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- Mar 14, 2011
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Thanks!
ncwg2boatguy
Well-Known Member
I run a 1-10 twist 26" and also have a 28". Both push 208 to 225gr bullets extremely well out to 1800 yds. But everyone's plans different. 1-10 ,26" is a great starting point. If you want to change in 2400rds swap barrels and give another twist a try .300wm is a jewel. Have fun .
MagnumManiac
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- Feb 25, 2008
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The 1:10" twist is fine for 230+gr bullets, the STANDARD twist in 30 cal is actually 1:12".
As to 'over stabilised', there is no such thing. A bullet is either stable or unstable in flight.
A bullet can be spun so fast that it is ripped apart by centrifrugal forces, but it is in fact stable prior to this.
Cheers.
WildRose
Well-Known Member
Make sure your life insurance is paid up before you pull the trigger on that hotrod.
eastbank
Well-Known Member
a little fun poked at the must have the newest, best do every thing crowd.
SapperRIP
Member
Look at the new 2018 Browning Hells Canyon Long range
SapperRIP
Member
http://www.bergerbullets.com/twist-rate-calculator/
If you want to do some calculations before going all the way in. I have a 1:10 twist on a 26" barrel and have great stability, but there are many factors so maybe this site can help. I would agree with most that 1:9 is probably the most optimal for an all around twist, and 26" is preferred.
If you want to do some calculations before going all the way in. I have a 1:10 twist on a 26" barrel and have great stability, but there are many factors so maybe this site can help. I would agree with most that 1:9 is probably the most optimal for an all around twist, and 26" is preferred.
Aoudad shooter1975
Well-Known Member
I'd do 24 in barrel--good compromise with gain and length and carry ability.
1-10 to 1-9 will shoot almost all bullet weights--my 300 norma has a 1-10 and has not trouble with 210 and 225 grain bullets--it wears a 24.5 in barrel
1-10 to 1-9 will shoot almost all bullet weights--my 300 norma has a 1-10 and has not trouble with 210 and 225 grain bullets--it wears a 24.5 in barrel
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That link is gold!
Stay above 1.3 but use minimum twist for your bullet/ velocity to maintain ideal tractability
WildRose
Well-Known Member
Have you ever watched a plane land? A slight nose up angle on descent is the most stable of all.
WildRose
Well-Known Member
One thing to keep in mind is that if ever you might need or want to shoot non lead bullets you will need a faster twist rate than for lead core bullets of the same weight due to the exaggerated length of the mono's.
Where a 1:10 is adequte for a lead core 230gr the 200gr mono will at best be only marginally stabilized and the 210 will not be due to the 10% or so difference in the densities of lead and copper.
Where a 1:10 is adequte for a lead core 230gr the 200gr mono will at best be only marginally stabilized and the 210 will not be due to the 10% or so difference in the densities of lead and copper.
That's the point. Being over stable is nose up. Perhaps good for a guided aircraft. Not so good for a projectile accuracy. As they say. This isn't rocket science - it's harder. Projectile science. There is actually a decent thread on tractability on this site. Check it out. I am just a messenger. No expert
Oh and remember. No one hunts beyond supersonic. That's where all this crap comes to play. So prob irrelevant - but interesting. Enjoy
Ciao
WildRose
Well-Known Member
You're only wrong on all counts here. As I said "slight nose up angle" and many of us here have and do hunt at ranges where the bullets are going transonic or subsonic.
An unstable bullet or marginally stable bullet will never be as accurate as a stable bullet the physics simply won't allow for it. It is when they become marginally stable that significant yaw develops which then has a negative impact on accuracy.
