I never messed with roundball plinker loads but am about to with a .310 Cadet (Greener). I found that a .315 roundball will thumb seat in my shortened and fireformed .32-20 cases. Plans are to smear some lube onto the ball after seating. My questions are: would a greased felt wad under the bullet be beneficial/necessary, and would a ballpark 2-3gr. Bullseye or 3-4gr. Unique powder charge be kosher? Thanks.