I have a 1936 production Model 62 in S, L, or LR. I purchased it as a match for another identical one and have refurbished both for grandsons. One feeds and shoots flawlessly while the other may or may not pick up a cartridge from the magazine tube. I have throughly cleaned it and have replaced the carrier spring and checked for any burrs that could affect pickup. I also have replaced the magazine tube spring with the appropriate length item but this has not changed the intermittent feeding. What am I missing?