What action did you use?
What kind of accuracy are you achieving?
Mine is on a Stiller Action. 140 Bergers at 3300fps. I have shot 1" groups at 400 yards.
Is this with home grown load data, or has it been pressure tested?
Is there free-bore?
What is the actual physical drop at 400 yards?
Have you tested out farther?
Reason for questions, I purchased vanguard 257 W, to build this cat on years ago. Never shoot the donor�. It is nice to see the real world numbers.
Thanks..