Case Stretch

[Steveu]

All, I did get to try some WW 45-70 that I formed into 40-65. The neck walls measured .009" thick. I loaded them up with 74 grains of Swiss 1.5fg to maintain the same compression as the SL brass and wet patched with SC55W. The WW was about 30 grains lighter, hence the extra room for powder. The velocity was within 10 fps of the SL brass and I did not get any case stretch at all! After I cleaned the brass I measured the ID of the necks of the WW and SL. The SL would accept a .412 pin gauge but not a .413". The WW would accept the .413" pin gauge. So, I think I need to get a .413" reamer to take care of the problem with the SL brass, because I do not want to neck turn the brass. I have had better luck with reaming. I looked at Forester's website and they will custom grind a reamer for $50. I would buy some Rem or WW brass, but it is not available that I can find. Comments are welcome!

P.S. Kurt, I have not checked the using your method yet, that's next on the to do list.