| casper50 |
| (.400 member) |
| 18/05/24 03:52 AM |
Re: .577 BPE needs the 640 grain
|
The twist rate of the .577 is around 1 in 96". A very small amount over 1/4 turn in 24". The heavier bullet that I have is a 615 grain, .584" diameter and is 1" long. Sound about right so far?