RE: 25 yards, 70 grains Pyrodex RS, PRB
patch is what grips the rifling and sets the ball to spinning. With out the patch, the ball fits somewhat loose and will tumble. The wad helps protect the patch from the flame and also increases the "pressure/engergy?" Not sure which word to use there lol. I'd buy some and give the wad a try. Doesnt sound like you need a wad withthe groups you're reporting. Having fun with the rifle?