I use Fiocchi primers in my knight. I have shot over 10,000 of them in my shot shells and never had one fail. As far as accuracy goes because of primers ?? I just shoot em and the bullets go where I point the bang stick.

There is nothing bad I can think of regarding the use of a 209 primer for ignition. I shot about 50 rounds last weekend and only cleaned the gun 1 time around the 30th round. We were shooting water jugs and sand-filled-cans out to 150 yards. It was a blast and I didn' t think that clean up was any more or less painfull than my bud with an old Kentucky hammer gun.