Yes and no. If your 200 has the centerfeed mag then yes it will work. Mine did anyway.
My understanding is the SF mags required a different mag box to properly feed, but I did not personally try a SF so take that for what its worth. I would say with the bigger bullets that the limiting factor will be your magazine length regardless of CF or SF. I tried bullets from 300 to 600grs and they all fed out of my CF as long as they were seated to fit my mag.
I had real good luck with RL7 and the 325gr FTX hornady bullets in mine. The 300gr (IIRC) TTSX's from Barnes did great also. I was intending mine for deer sized game with those loadings, never got the chance to go for a deer with it though, but the ballistics and accuracy were suitable for that out to 200yds or so for my tastes. My barrel had a lot of freebore in it for the bigger bullets and the short ones had to jump it, had the chamber been cut to handle the shorter bullets I wonder how much better the accuracy would have been.
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