40-65: Learning what I can

[Gunlaker]

That sounds like a nice project. The .40-65 is an excellent cartridge. Shiloh is not transitioning away from the 45 degree reamer to my knowledge. They can go to a 7 degree angle if you specifically request it. I shoot one of their .40-65's with the standard chamber. I like it a lot although it will lead just a little. I recently did a chamber cast and can post a picture if you lke. It looks just like their .45-70 chambers with a 45 degree transition, maybe 0.050" freebore, and then a reasonably shallow leade. I didn't measure it, but if memory serves it's something like 2.5 degrees. I think Kurt knows.

I agree with starting with .45-70 brass.

If you want a bullet heavier than 400gr you might need a bit quicker than 1:16 twist.

I've found good accuracy with 58gr of FFFg Express and the Saeco #740 bullet, or 60.5gr of OE 1.5 and a 400gr Kidwell Money bullet.

Let us know how the project goes. I like the old Ballards. I have a Pacific in .40-82 but haven't got around to calling RMC for brass.

Chris.