I said earlier that I'd used the 777 winchester primers last year and really liked them. I fired off several dozen last year while testing different bullets at the range and while hunting. They worked like a charm and crud ring was pretty much nonexistant. A few weeks ago, while breaking in the KRB, I had 3 of the 777 primers not ignite the powder charge. They just made a weak poof sound and then nothing. The rifle went off with a second primer, but it made me wonder about what I've heard concerning the 777 primers and their reliability. Next range trip, I'm going to try so regular Winchester 209 primers.