I have a Mauser 98 in 30-06 with a longish chamber that will cause head separation in as little as 2 re-loadings if FL RCBS resized.
This rifle bolt does not close on a NO GO gauge.
I resize using only the minimum shoulder bump required to allow gentle bolt closure.
I have a mixed headstamp box of brass that I have reloaded >30 times,
I do anneal case necks after 5 firings.
IIRC, Hatcher or Whelan reported testing to >50 loadings, and IIRC a report of army testing to >150 reloadings.
30-06 is reported to be less prone to case head separation than 308W.
I would not expect this case service life to be likely from 300WM,
but suspect that the limiting factor will be primer pocket expansion (particularly with FC brass)
and not case wall life when properly resized for minimum shoulder bump.
The short necks can be problematic if not annealed,
and necks can easily be pulled out of concentricity by an internal expander. I suggest using a Collet Neck die for best neck concentricity
Good Luck, YMMV
|