Hopefully the AR member who created this will tune in.......

http://www.australianhunting.n...ticles/358%20CRG.htm

Our Ausie friend Con was making one.

Yes ... that one is in AHN forum member Richard Kymble's possession. I should get around to building mine ... but so many projects ... so little time!

Actually ... I'll check in with RK as he's been running 200gr pills and has some reload data. But ... he's just about to finish a 416Taylor.
Cheers...
Con

The 300rcm case has the best balance of everything for no fuss ideal fit into the saM70 wsm receiver.
It trumps the 284win,350remag,SAUM and WSM case.
ie; no belt, no rebated rim, decent neck length, moderate shoulder angle,seat plastic tip bullets to cannelure and still fit magbox, one more down than fatmag case.
water cap. 300rcm 72.7gn Vs 69.2gn 30/06.

nice one Con,...

We also wanted an easy conversion on 0.473" boltfaced rifles. Enough 'smiths have converted such rifles to 350RemMag to make it feasible, unlike the WSMs. First went into a Hawkeye 358Win and the 'smith rechambered with ease and had the feeding sorted very quickly.

Catch in Australia is that 300RCM brass has become very difficult to source.
Cheers...
Con