That would be pretty much like my sst necked down only mine is shorter. You' are right about barrel makers
So who is the mfg? Sounds pretty interesting.
By the way, a 375 Sherman is in the works. I'm guessing it will run a 300 grainer at 2600. This in your daddy's ol '06 Remington action
I actually agree with that but not sure which bullet the "anonymous" builder is choosing and we know how large a role bearing surface plays, so I was being pretty conservative! With the 338 capable of 2700 with the 285 in the same case, it likely will reach 2700 with a larger cross section pushing only 15 more grains. Should be a hammer on an '06 head size! The builder has a brownie hunt coming up this fall. Should get some good field data!
If it does make 2700, that's crowding 2 1/2 tons of M E!
Yep... All I need is a 7-twist .257 blank, and Rich to send me a .257 Sherman reamer and dies... And I'll turn my .25-06 AI into a switch-barrel, that way I can swap back and forth at-will. And with the SB setup, in the future all I will need to do is have barrels threaded and chambered to a few counter-bore & headspacing specs, and I can order pre-cahmbered barrels and have them sent ready to be screwed onto my action.If that 130 gr .257 is true, I'd definitely consider going with a 25 SS. A fast quarter bore is too fun to pass up.