As far as the article by Tom Armbrust, most trap shooter's guns are quite a bit heavier than other guns, so he probably wouldn't notice the difference in recoil when changing primers. (In fact one of my trap guns is a 686 (single barrel) that he mentions and I wouldn't notice the difference in a primer change from the recoil). And not very many trap shooters who reload, would do something to change the velocity of their loads by 200 feet per second without adjusting the formula to compensate for such a change. Nor would they enter a shoot without trying the load out first. Especially if they were going to spend money on the shoot. So, most trap and skeet shooters at my club, who reload, just use the primers that they can get and some just buy the ones that are the most economical and never think about the other stuff that much. I try to keep mine pretty much the same. But primers were never that much of a big deal to me when I reload. Just my opinion.
