Forming 264 Win Mags from 7mm Rem Mags
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
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) |
As can be seen, the case length is the same, 2.5". Shoulder dia is the same, .491". Rim dia is the same, .532".
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.
Thanks,
uncle jimbo