If your shooting 100 grains of Pyrodex or Triple Se7en pellets and want to go to loose, since the two pellets are approximately equal in strength, yes you would load 100 grains of loose Pyrodex RS. If Pyrodex is what you want to shoot. Personally I would suggest starting your load testing at 90 grains and work up from there. You might find 90 to even 110 grains produce the best accuracy and power for your projectile.

Seating pressures.. I try to move the projectile down the bore of the rifle in one smooth,solid motion, stopping when I feel the projectile seat firmly on the powder. Then I give it just a little grunt of pressure (we are not talking the incredible hulk mind you)harder if it is pyrodex or black powder, leave it alone nice and firm,if I am shooting triple Se7en, and really grunt if I am shooting APP or pinnacle. This is where keeping your bore swabbed, and a quality range rod are of great value as you will discover.