02-21-2016, 05:25 PM
Cornbread Wrote:I would try another powder. You should be in the 2500 fps range with a 20" barrel. With 8208 in an 18" I'm getting upper 2400's.
According to these Nosler numbers, 8208 gives about 40-50 ft/sec more than TAC when you extrapolate to equal loads. So I was still surprised at how much more you were getting with the 18" than he got with the 20". http://www.nosler.com/nosler-load-data/65-grendel/

