Boonerbuck, I pulled this off another site
"Your problem may be that the mag body is not fitting into the recess on the floorplate/trigger guard assembly. There is a step cut out that the mag body must fit into so that the mag body is straight and aligned with the receiver cutout. This would cause the pinching and mis-alignment of the rear slit on the mag body. We have had similar experiences at SOTIC and it is almost always caused when the student fails to check the recess during re-assembly. This is a step we drill into the students for re-assembly check. Open the floorplate and feel inside the mag body. Does the mag body fit inside the floorplate assembly recess? If not, loosen the receiver screws and re-align the body with the recess. If this is difficult to accomplish, then remove the stock and check to see if the mag body fits inside the recess when the stock is off the weapon. It may have been torqued out of shape due to it not fitting before, and being squeezed under pressure of the receiver screws. Anytime that the weapon's mag body is not aligned with the recess and fitted into it, the results are exactly as you described your problems. In .308 it is the fourth round that is difficult to load and the fifth is impossible. The third round jams in an angled down position. Hope this helps. "
Boonerbuck, Pull your stock off and you will see see there is a cutout for the mag body that needs to line up with your barrel on the front . Place the mag body back into the barrel lining it up flush, the back of the mag body has a split, that has to be compressed when placing it back in the barrel assembly. Then reassemble the barrel and mag body as one unit into the stock and put the floorplate on . If the mag body is not flush with the barrel assembly, eg. the front it too high and the back is too low, then they will jam and you will scratch the rounds going in on the front of the magazine body.
Hopefully this helps, its worth checking anyways.
