Stupid question time. I'm new to reloading. I have a large quantity of lake city m72 brass that has all been fired in my gun. About 3% of the m72 brass is hard to chamber. Hard meaning slight resistance when closing the bolt. The cases are not too long. The rounds fired from these cases are not accurate, they fall as much as 3 moa from other rounds. After removing the cases they have slight rub marks where the extractor and ejector touch the case, ie the case does not rotate with the bolt as it is closed.
I switched to a full length die and tried sizing these cases. The die leaves a very narrow shiny ring around the large(bottom) end of the tapered part of the case right where the taper starts. After sizing the empty cases all chamber butter smooth. I verified the empty cases still chamber with resistance before sizing to ensure it was the cases causing the resistance.
Any reason why some of these cases seem to be not quite sized properly? I'm going to keep them separate and verify that they now are accurate before adding them to the pile.
The M2 brass has crimped primers. Do loose primer pockets ever limit the life of m2 brass? If so, what is the best way to remove the crimp to get the most life from the brass?
I switched to a full length die and tried sizing these cases. The die leaves a very narrow shiny ring around the large(bottom) end of the tapered part of the case right where the taper starts. After sizing the empty cases all chamber butter smooth. I verified the empty cases still chamber with resistance before sizing to ensure it was the cases causing the resistance.
Any reason why some of these cases seem to be not quite sized properly? I'm going to keep them separate and verify that they now are accurate before adding them to the pile.
The M2 brass has crimped primers. Do loose primer pockets ever limit the life of m2 brass? If so, what is the best way to remove the crimp to get the most life from the brass?