500 A Square twist rate

[Jmal]

I'm looking for some input on a proper twist rate for my rifle build, 500 A Square. The plan so far is an 18" barrel shooting 570gr pills somewhere between 2100 and 2300 fps. I've run the numbers and done some research. I've seen anywhere from 1:10 to 1:26. I'm leaning towards 1:14 maybe 1:15.

Thanks in advance!

 

[analog_peninsula]

As I recall, mine is 1:12. It’s a factory A2.

 

[analog_peninsula]

FYI, you can break 2500 fps with the right combination of 570 grain loads. They are a little snappy, as you might expect. Ah, I just noticed the shorter barrel. .

 

[Jmal]

Perfect, thanks for the info.