Bob you ever play with a 7-300? Seems a lot easier to neck the 300 Winny straight down instead of forming cases for the Mashburn.
Bellydeep I have formed cases for it but never chambered a rifle. One buddy of mine on here has/had a reamer.
For all practical purposes, that's the 7mm Practical developed by Nathan Foster of NZ, but really it's been around a long time.
I like the Mashburn better due to the longer neck, A short neck has been a criticism of the 300 Win Mag, too.
But ballistically the Practical and the Mashburn do the same things.
