Short range target load for a Pedersoli 45/70 bore

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I am just preparing for the weekend with some low recoil 50 meters loads for my Pedersoli Rolling Block 45/70 rifle for offhand shooting. I loaded 28 cartridges with 34 grains of 3Fg Swiss powder + 25 grains of semiola + a cardboard wad + a 405 grain Lyman flat point bullet sized to .458″. Overall cartridge length: 68,77 mm, no crimp, fire formed cases. Lube is my soft lube with 0W40 engine oil + besswax + tallow. I usally shoot heavier bullets (Lyman Postel) with heavier loads (55 grains of 1,5 Fg Swiss). I am curious how it will work out. What do you think?