I had a fascinating experience with primers recently. I was using Winchesters at the range with BM3.I bummed a few Kleanbores from a buddy to see what they would do. Lo-and-behold, the Shockwaves hit 6" low and sprayed over the paper.[:'(] Lesson learned: you can't just switch primers. Since T7 burns faster than BM3, the Kleanbores may be hot enough. CCIand regular Remington primers would be an in-between choice if the Kleanbores don't kick the T7 hard enough; I had good luck using regular Remingtons back when I was still using loose T7.

Paul (rabbitbuster)

"The first rule is to keep an untroubled spirit. The second is to look things in the face and know them for what they are." -- Marcus Aurelius