I can tell you that one of my VA Arms 3gun teammates and I have had many more problems with black box XM193. Personally I've had 2 ammunition failures with brown box out of 8K rounds, my teammate and I have had at least 10 failures (maybe more) in less than 2K rounds with black box.
Nov 16, 2018 · Federal Rebate: Black Friday Black Pack Bucks. Get up to $100 back when you purchase Federal, Blazer Brass or American Eagle Black Pack Bulk Box or Can Ammunition. Offer valid from Nov 16, 2018 through Dec 2, 2018. Rebate form