Could anyone please help in regards to exactly what a 30-357AET is? Anyone have chamber specs?
Note that RCBS list dies, thought it may make an OK cartridge for a Martini or a Low-wall (possibly).Pressures or back trust may be well and truly too much for a L/W, but I've never come across the cartridge anywhere before.

H&H Mad.

PM me with your email and I'll email you a dimensional drawing of the cartridge.
Regards,
HockeyPuck

and a 32-20 with a 308 barrel is a better round, with load data....

okay, it's not better.. it's the same from a practical POV

jeffe