My Catamount doesn't have any feeding problems at all. I'm just limited to the 5 & 10 rd. mags. I do know the drums are heavy. Friend has a Vepr., but his Drum is 12 rds. and Maaan Is that Heavy!! He shoots in a natural depression with a 20 ft. Berm, and Gravel at the bottom. He's a construction supervisor(ex-Navy SeaBee) and has some junked Safety Barriers and Cones. set up 3 of the Cones topped with Tannerite cans at 100 Yds....Nice boom, no spark or fire...
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"The difference between a successful person and others is not a lack of strength, not a lack of knowledge, but rather in a lack of will." Vince Lombardi
"No One, and I MEAN NO ONE Craps on me and Gets away with it!!! Those days are gone...