Although I do not have a load to offer you. I just want to say becareful of super light charges of fast burning powder in this and other such sized cases.
If you feel you must have a super light load use the bulkiest powder you can find and add a filler on top to help keep the powder near the primer. I have used corn meal, (Too heavy) Oat meal, (Makes you hungey) Super granex shotshell buffer.
If you invision a cross section of the 45 colt case with a bullet seated. Invision the powder inside, if held horizontal. Is the powder over the primer flash hole? If no, you need more powder, or a different recipe, as this is a recipe for detonation. Detonation is a very dangerous thing. It can destroy your gun and anything in close proxcimity.
Personally I say, if I need less recoil I shoot less gun. I stay away from these superlight loads! I value my gun and my hands and face too much to gamble.
Just FYI, I hope you never have this problem. I offer it for informational value.
Like someone said, to be for warned, is to be so armed.
CW