Originally Posted by 300WSMMAD
What is the theroy based on?? courious to know how you can accurately messure a 1-5 fps increase, you can do that by changing primers.
I said at a guess...maybe
Theory, well if we have say somewhere 20to50fps per inch barrel and
depending on baffle design maybe a total of 1/2" of straight over sized bore
where the gas pressure might give a bit of a shove.
That's where my guess came from.