Ask your guide what the minimum caliber should be. Guides have prejudices and some are reasonable
As for push feed vs. CRF, every military rifle action developed since 1898 has utilized push-feed. They are reliable.
What about the 1903 Springfield and 1917 Enfield ? But you are correct that all the semi automatic military rifles are push feed. So we're the early military Mausers, until reports of rifles jamming due to human failures due to the high stress of combat. The CRF rifles came about for that reason and under some hunting conditions they are still preferable.
