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Twist rate for 220 grain bullets in 308?
- Thread starter Glamdring
- Start date
Or perhaps switch to Barnes X in a lighter weight. They do seem to penetrate quite a bit better than "standard" bullets. I've yet to recover one. A lighter weight will also suggest a higher velocity, flatter trajectory & Barnes X have great ballistic coeffcients.
'Course, with Barnes, the bullet is made of copper (no lead) so any given weight bullet is longer than its lead counterpart & you can run into the same overall length "problem."
What's the intended use that you want to use a 220 gr bullet?
'Course, with Barnes, the bullet is made of copper (no lead) so any given weight bullet is longer than its lead counterpart & you can run into the same overall length "problem."
What's the intended use that you want to use a 220 gr bullet?
I don't think 1 in 10" is fast enough, at least to keep the bullet stable after impact. I am wanting to do some testing of solids with small bores--the 6.5mm, 7mm, and 308--and compare them to standard "elephant" calibers.
I am curious to see if Bell really gave anything up for penetration by using a 7mm.
And I only want to get 2150 to 2200 fps which should be easy enough to do with the 308 case and 220 bullets, I think.
I am curious to see if Bell really gave anything up for penetration by using a 7mm.
And I only want to get 2150 to 2200 fps which should be easy enough to do with the 308 case and 220 bullets, I think.
Badger Arms
New member
358 Winchester
I've got the Luxury of having .358 Winchester's which I shoot .250 grainers out of at 1-in-14 I think. I don't shoot anything larger than 168 out of my .308's. My Moose Gun (or wish I would have shot one with it gun) is a 300 Magnum which I've shot 220 grain bullets out of on occasion. Worked up a sub-MOA load with it but haven't used that heavy a bullet in a while.
I am sure that, out of a standard length bullet, a 200 grain bullet would be stabilized well with 1-in-10 or 1-in-12. You might suffer in the 125 grain range with anything faster. .30 caliber rifles aren't that sensative to twist in my experience.
I've got the Luxury of having .358 Winchester's which I shoot .250 grainers out of at 1-in-14 I think. I don't shoot anything larger than 168 out of my .308's. My Moose Gun (or wish I would have shot one with it gun) is a 300 Magnum which I've shot 220 grain bullets out of on occasion. Worked up a sub-MOA load with it but haven't used that heavy a bullet in a while.
I am sure that, out of a standard length bullet, a 200 grain bullet would be stabilized well with 1-in-10 or 1-in-12. You might suffer in the 125 grain range with anything faster. .30 caliber rifles aren't that sensative to twist in my experience.