Good morning all. I’ve stumbled onto a rifle I’ve been educated on, a Bannerman and R F Sedgley made 1903 clone. The firm made scrap metal receivers into firearms by stitching 1917 parts to a 1903 receiver. The gun was fitted with a 1895 barrel and bears no military proof marks anywhere.

I took my son shooting for his birthday and brought my M1 rifles and some military surplus (maybe?) FN 66 ammo. I only shot one of these two M1's that day (the one with the bayonet, of course) and after a few rounds I noticed that 50% of the cases had primers that were "proud" or slightly...