I've found about a dozen rimfires around the shop that I'm testfiring to see if they're ready for sale. Just a heads up because I'm sure to be back for advice. This Marlin ,which I'd never heard of before today, is popping the cartridge nose past the chamber. I threw away my old(home) Numrich catalog so do not have any idea how close to the chamber the triangle shaped cartridge guide should be or if this is the problem. It's about 1/16" above the chamber and only everyother round chambers and it tries to double feed the rest of the time. Any ideas?