All of my hunting rifles, meaning spot and stalk, are CRF, either M77 MKII, Kimbers or Win Model 70's. The ONLY fail, a double jam, I have ever had was using a push feed for the FIRST TIME, I hadn't familiarised myself with it's function fully, so after sliding a shell in the chamber, I failed to lower the bolt handle and when I withdrew the bolt, the shell stayed in place. My buddy informed me that I needed to lower the bolt on a round for it to come back out, so I pushed the bolt forward and the next round, which I had forgotten to unload the mag, was then pushed into the other one and jammed the bolt up somehow. Took considerable time to clear too, which my buddy, his rifle, was very unhappy about.
The only push feeds I use are when spotlighting, all are Rem 700's that are also my comp guns! They are switch barrel setups, so I can screw on a 22-250 barrel and go shoot varmints under the light. No need to have 100 different guns, just screw off a barrel and use a different cal. I often use my 260AI barrel also since I retired it from comp work. Does the trick.
Cheers.
:)