Noted something else too regarding "mixed" brass. I had to sort out a bunch of A-MERC (American Ammunition Co., 3545 NW 71st St, Miami, FL 33147 USA) brass due to improper manufacturing. There is no rebate above the rim and it jams the 1050 since it won't slide into the plate. Pain in the ass to sort a bucket of brass to cull 50 pieces.
Pics show (L to R) A-Merc with rebate, A-Merc without, and a Winchester case for comparison.
Pics show (L to R) A-Merc with rebate, A-Merc without, and a Winchester case for comparison.