For me, it was about paying a ridiculous price for 3" #5's. I love some #5's rabbit hunting.
I used 9.3x64, I believe. It was in several contender and encore barrels. Fireformed with cornmeal, ran a bore snake through between each forming to keep the dimples out of the brass. I ran a swipe of finger nail polish on top of about 10 drops of candle wax, on top of the card board. Never had an issue with the card moving. Never an issue with extraction either.
Enjoy the experimenting.
R.D.
