Hi all I have a S&W 629 classic. I went to Cabela's looking for primers. All they had was CCI magnum large pistol primers so I bought some. I have a ton of Bullseye powder that I use in my 9mm and 40. I will be using 240 grain FP Berry's Preferred Plated Pistol Bullets. I have read to drop the load 10%. Some say don't use mag primers in a fast burning powder but it is all I have. I was wondering what you guys thought? I am very careful with every round I make.