Don't see the logic in replicating what you already have, ie the .22 LR. If you want to simplify the project, try some .310 diameter round balls in the .30-30. Start with 3.0 grains of Bullseye and work down. Put a card wad under the ball, straighten the case neck but do not crimp. LR primer or LP if you prefer. Tumble lube with ALOX cut with mineral spirits about 10% by volume. I get about 750 fps with that load using a 180 cast 311041, you'll probably see somewhere around 1100 fps +/- with the start load and round balls.
Use caution, check the bore before shooting the second round if the previous report seems the least bit unusual. Mouse fart loads have been known to leave a bullet in the barrel.
