Funny, my marlin semi auto's (60ss & Papoose) cycle everything. They even cycle standard velocity, and my 60ss when clean cycles cci subsonic ammo. The only ammo I've had issues with is Remington, and that's not my guns fault.
I've had problems with the Remington Thunderbolts in a couple of rifles I had. Won't waste my time or money on them anymore. The Vipers and Yellow Jackets work fine.


















































