Originally Posted by rcamuglia
I built a Mashburn on a Browning long action, cut the chamber with Bob’s reamer that he let me borrow, dropped it into a McMillan A3-5 and mounted a Leupold Mark 4 M5 A2.

Dealing with the brass preparation, donuts, neck turning is the biggest problem. The gun shoots very well with my nine twist Bartlein barrel shooting the 195 grain Berger.

This combo accounted for the longest range kill so far.

If I had it to do over again, I would just go with another big seven of equal case capacity or greater with available brass. A buddy of mine shoots a 7 mm Practical which has a little more capacity than the Mashburn because the neck and shoulder junction doesn’t move too much and making the brass doesn’t create the problems like the Mashburn.

I’d also go 8 twist and shoot the 180 ELD-M


I remember that blaster. If I wasn’t so heavily invested in 7 Mashburn dies your advice for the 7-300 / 7 Practical is golden.

Semper Fi