The 6.5 Something NOW HAS A NAME!
6.5 BLASER MAGNUM IMPROVED!
Got a drawing from JGS yesterday. Parent cartridge is a 7mm Blaser Magnum necked down to 6.5mm with 40 degree shoulders. The drawing is a PDF file so I can't manipulate it, copy or share it. Wish I could! Case capacity should be about 76+ grains. It's basically a 257 Wby Mag minus the belt and no radiused shoulders.
I've got some questions, cause I've never done this before. I'm mainly interested in how much free bore/throat to specify. I plan to shoot Hammers in a 1:7.5 twist barrel, but want to be able to shoot both Hammer Hunters and Absolute Hammers. I' guessing the throat will need to be around 200 thousandths, as that's where my 338 Sherman ended up, but I really have no idea.
Also, what about body taper? How much to specify, and why?
OK you gunsmiths and gurus out there. Give me a hand with birthing this new baby!
Thanks