Great choice Mart,

I've got a question about the COW method for forming the 400 from the 35 Whelen.

Being that the Whelen measures .441" at the shoulder and the 400 Whelen measures .458" at the shoulder. Do they both share the same datum line at some place between the neck and shoulder junction.?

"I'd rather have an Army of Asses led by a Lion, than an Army of Lions led by an Ass." (George Washington)