smorrison

Thats exactly what i figured the problem was. Not enough force in the shot for the inertia driven bolt cycle the next round. Thanks for the clarification.

I ran about 100 rounds through the tactical this weekend. AA 1-1/8oz no problems. Heavy game load 7-1/2 no problem. 1600 fps 00BK no problem. Remington "disintegrater" 00BK would fire but short cycle the next round. It would not allow the next round into the chamber. It would get wedged below the action and was a bear to clear. Not sure if there wasnt enough power to bring the action all the way back but they are only 2 3/4" shells. Makes me wonder how good a 3" would feed? Barrel is stamped for both.

Glad to have found this thread. Picking up my MC312 tactical tomorrow. Saw the gun 'likes' a 40 rnd high brass break in. Going to send two boxes through to help settle things in. Hoping for clean cycles after. First mod will be putting the Nordic +3 kit that others are suggesting, should end up perfect with the 18.5" barrel.