Thread: Brass deformation - rimmed (303) vs shoulder (308)

I think a lot comes down to individual actions and chambers.
I reload for a Savage 99 in 243 and have to full length resize every time else I can't get the brass to re-chamber, hence I have to neck trim every time from the second use. (Tight chamber)
I have just started re-loading for a Savage 99 in 358 Win and only have to neck size hence after 2-3 firings I still have not had to neck trim.
Both loaded to 1 grain under new book maxs.
My custom bolt action loaded to close to book max just take's neck sizing and after >5 reloads I still have not had to trim any brass.
(buy good quality brass)
Zq