Cz 550 .375 bolt face caliber options

k128

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I just won an auction for a cz550 safari classics complete magnum receiver with a 375 h&h bolt face. I've never had a rifle built before, but I know the easiest (read cheapest) thing to do is a bell and carlson, and have the action fitted with a caliber thats h&h based. I've already got a 375 h&h and a 416 rigby. I want to go as large as possible and i think the 458 lott is essentially the largest for the bolt face if I'm not mistaken? I'd love to go .500j or 505 gibbs, but does the bolt face/extractor have enough meat to machine to the case head specs?
 

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Ray B wrote on JMJ888's profile.
I am righthanded, so not interested in the rifle, but I have a 375 RUM and 350 gr bullet loading data is very hard to come by. If you could reply with information regarding your loads I would greatly appreciate it. Thank you, Ray Boone, Leavenworth, WA
mcr wrote on gbflyer's profile.
Hello - I was looking at your post from several years ago regarding the Winchester 300 H&H. Any chance you still have the lefty M70 300 H&H for sale?
Thank you, Mike
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