Had an acquaintance call me the other day and ask if I would load him some 264s. I told him I don't load for other people but if he wanted, I would help and lend my knowledge and he could do it himself. Told me he had a friend that load for him, but he had moved out of the area. He has the die set, shell holder and a neck sizer. Set up a date, he showed up with dies, powder, primers and bullets. And 5 cases. Was told that was all he had and cases are next to impossible to find and if you can find factory loaded rounds, you better have deep pockets. Well I had set aside 4 hours to spend teaching him how to load for himself and he had 5 cases. Which we didn't load as I told him I would look for some cases. He's right, very hard to find and very expensive.
So I went looking in another direction, and found out that the parent case for the 264 is a 375 H&H case.* The 7mm rem mag is also a derivative of the 375 H&H case.
So I would like to try forming some case out of the 7mm. The specs for the two are,
264 Win Mag 7mm Rem Mag
As can be seen, the case length is the same, 2.5". Shoulder dia is the same, .491". Rim dia is the same, .532".
Bullet diameter .264 in (6.7 mm) Bullet diameter .284 in (7.2 mm) Neck diameter .299 in (7.6 mm) Neck diameter .315 in (8.0 mm) Shoulder diameter .491 in (12.5 mm) Shoulder diameter .491 in (12.5 mm) Base diameter .515 in (13.1 mm) Base diameter .512 in (13.0 mm) Rim diameter .532 in (13.5 mm) Rim diameter .532 in (13.5 mm) Case length 2.5 in (64 mm) Case length 2.5 in (64 mm) Overall length 3.34 in (85 mm) Overall length 3.29 in (84 mm)
So If I anneal the case and then run it though the 264 die and trim to length, I should be good to go?Or is the neck inside and outside dia going to be a problem
Any and all input would be appreciated.
To anneal a case, I was going to set them in a cake pan with water about 2/3 way to the case and use a propane torch to get them cherry red and then tip them over in the water and let them cool. Is this correct? Never done it before.
* I was not aware of all the cartridges that have the 375 H&H case a parent case.