MN chambering issues

[10X custom guns]

Check the recoil spring, it can cause a weak mag follower.

Information

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[Homer2]

Check the recoil spring, it can cause a weak mag follower.

Take the floorplate and follower assembly out and out/clean well. It may not be pushing up enough. Also, make sure to clean the interruptor/ejector parts. Cosmo or dirt in them will cause feed problems as well.

Here are dis-assembly instructions:
Mosin Nagant Rifle Exploded Views and Disassembly

I wouldn't take it all apart, just take off the floorplate assy and interruptor/ejector parts and clean those areas and see if it works. This rifle was designed to prevent the rimmed cartridges from jamming in the magazine, so if it is jamming, the interruptor/ejector isn't working. The follower assy should be very springy, so if it's sluggish when compressed, it needs cleaning. Breakfree CLP should loosen up the parts.