Blueridgeguy
Well-Known Member
28Nosler
Rev--I've been in the 7 Mashburn Super business for 3 decades. Very easy to make cases, and a wonderful round to work with. I've been thru a multitude of barrels.Which one is equivalent or even a tad "better" (for 160s) than the 7mm Mashburn Supermag? I have handload for simple necking down rounds .i.e 6.5/284, 6mm & 6.5/30-30 and 6mm/284 and afew necking ups, i.e. 6mm/222 Mag; 22/6mm Rem. But never fooled with bushings, two or three steps, neck turning/reaming/annealing, just haven't desired it is all. One reason I never went 7mm/300WM. I love them all, just no time and money, ha. I always wanted a 7mm Mashburn SM even when I got blistering speeds with the 140's and the big 7s.
@pacowboy says it all beautifully here. What I get for reading the thread then replying later because I basically re-stated what he did. BUT... i will say that i can remember reading abput the 7-300 WM and 7-300 WBY years ago (late 80s early 90s) and how good of wildcats they were for accuracy and long range performance.You could always go with a 7mm-300 Weatherby and then you could say you are shooting a caliber that held the world record at 1000 yards at one time. Was around long before Lane Simpson stole the idea for the STW and is almost identical in ballistics. Any 300 Weatherby brass will work for it as well by simply necking down or Quality Cartridge makes 7mm-300 WBY brass. I'm shooting 180 Bregers around 2900fps out of a 28" Douglas barrel.