Congratulations on your new rifle, and you are going to love it!
This is probably getting old for some folks to keep hearing about the 45LC, and especially those who don't have one yet.
I've had mine to the range about four times now, and twice since I reamed it to .454 Casull, and ever trip it never ceases to amaze me with it's accuracy and just the sheer pleasure it is to shoot.
I've worked up two loads, one for the 45LC and one for the Casull and they both group inside an inch at 100 yards.
I didn't actually think I could do it, but this last trip made a believer out of me.
Same distance, same bullet, same powder, different grains, and both impact within one inch of each other in a 1" group.
I smiled all the way home, and you will too.