Originally Posted by bigngreen
What would the problem be with pushing the shoulder back with a regular 375 Ruger die modified like Paul has said then stepping the neck down with a bushing die and fire forming the shoulder out to 40 degrees.
If Pauls theory works with the 375 die, and I think it will, that is what we plan on doing. This also falls right in with Gunmans spec. My case body is slightly longer with about the same neck. (because of the 40 degree shoulder). Also my body will have .006" less taper.
The end result will be around a 1 grain increase in case capacity over Gunmans case (although I haven't really calculated that)......Rich