I like shooting 5 shot groups, but I wanted to experiment some, so I didn't have time to shoot 5 times with each load. One disapointment I had was with the Variflame system. I bought it on sale hoping that also would increase accuracy. For those of you who aren't familiar with it, it's made by Precision Rifle (same company that makes Dead Centers) and it's basically a brass cup that is shaped like a 209 primer and holds a small rifle or small pistol primer. It promises better accuracy and less fouling. The less fouling part is true, but I'm not sure about the accuracy.
I fired 10 rounds with it, and out of 10 I had 2 misfires. Out of the 8 times it fired, at least 2 of those 8 had noticealbe lag times between the "pop" of the primer and the "BOOM" of the shot. This probably caused me to flinch a bit and might have messed up the group I shot with them.
Personally, 2 misfires out of 10 is not acceptable to me. I'll give up a little in accuracy to know that the rifle is going BOOM every time I pull the trigger. So after that, I switched over to the Federal 209's for the rest of the session.