I have both CRF and push feed rifles. The push feeds are particularly nice when I load bullets long, making the cartridge too long to feed from the magazine; thus my target and varmint rifles are push feeds; mostly Remingtons though I have a soft spot for old SAKOs. I can see no reason why a push feed M-70 shouldn't prove suitable 95% of the time, and there is an argument to be made for the superiority of a flat bottomed rifle vs a round one. With a push feed action, I can simply drop the round on top of the follower and close the action without any issues. If a rifle is always loaded with a spitzer style bullet, and if the action always receives the care it requires while in the field, the push feed will work reliably and without complaint in all circumstances. Ross Seyfried used a push feed M-700 Remington in .416 Remington when he worked as a PH, and that rifle proved its worth.
In the field though, I prefer the simplicity of CRF actions, like my Brnos, my 98 Mausers, and my M-70 Winchester, and I very much like the Ruger Alaskan and Hawkeye rifles I've had the opportunity to use recently. I don't need a spring and plunger to eject the cartridge. Because the cartridge is held to the bolt face by the extractor as it is drawn from the magazine and pushed towards the chamber, its feeding is less sensitive to bullet style, and I frequently shoot WFN cast or blunt nosed jacketed bullets, which can present a feeding issue when loaded from the magazine of a push feed rifle. In the field I prefer to use an open faced bolt, if a poor load results in a case head expansion, I can withdraw the CRF bolt and remove the cartridge, but with a Remington style bolt that surrounds the case head in a ring of steel, the cartridge case with an expanded head is more than difficult to remove, and the rifle is out of action.
