The backside of the loading gate is not fitted right therefore the cartridge will not slide in line as its wedged against the front thin edge of the loading gate (angle of front thin edge does not taper of steep enough and loading gate must be as flush with the outside of reciever as possible without jumping out) i know this since i had the exact same problem. I messed up the origional gate overfiled it a bit replaced it with a reproduction Model 92 Winchester loading gate that worked fine in place of rossi's. Also did some spring trimming to cure the crushed case mouths and shortened the magazine spring quite abit. Look at the inside of any properly working winchester of any caliber a 94 30-30 is a fine example and compare it to yours you will see where the problem lies. Fired mine after doing these things and its worked great ever since.