In the case of Federal primers, the only difference between match and regular primers, is that match go through one more inspection process than "regular" primers, nothing more.
The explanation I've seen in print more than once is that the primers are "grouted"'by the employees that have been the most consistent at that task. No difference otherwise; the inspections weren't mentioned IIRC. Same goes for CCI, except for the little "B" on the cups.
After a considerable dearth in the supply, I scored some thousands of the 210 Match, enough to last my needs. Bought a brick of the CCI BR2 with my teeth clenched before that, but likely never again. Don't know if the match stuff helps in my hunting rifles, but can't hurt.
