Twist rate for 220 gn .308 bullet

[ss1980]

I'll use 220 gn round nose from Hornady with exposed lead end. Why that heavy? Dangerous pray hunt. Don't want to take any chances. But also don't want to flinch from a larger cartridge.

1-10, out of 308 should work fine with 220 but bits on the edge depending on velocity and overall bullet design. If it was a 300wm you would be okay but the velocity on the 308 will be much lower. As asked above, why a 220 out of a 308? You can always try and "stretch" things but a 1-8 twist would be a sure thing, but again I don't know the bullet you want to shoot. 220gn is a little vague.

 

[ss1980]

You are quite right. I intend to reach velocities between 2000-2300 fps, not exceeding that. I will be shooting at point blank range 25-60 yards. So dropping as a stone, hippo should be.

What would the velocity of that bad boy be.... I suspect it would drop like a stone at further distances... I know there is the big arguement of velcoty vs weight, but at one point you are getting out of it... I think 220 would be that.

2250 to mid 2300 fps?