To go a little further with Muley Hunter's double set trigger info, there is a screw in between the two triggers that adjusts the amount of creep in the front trigger when you use the set trigger. It is only for using the set trigger, it doesn't change the front trigger creep at all if you just use the front trigger to set the gun off. Anyway most new to a T/C people see that screw adjusted out and think it's a loose screw, so they "tighten it". The farther in it is turned, the less creep adjustment in the front trigger, or in other words it makes for a really light front trigger when the set trigger is used. Instructions for setting it:
With the srew adjusted out set the hammer to half cock, pull the set trigger until it clicks, then adjust the screw slowly in a clockwise direction ("tighter") until you hear it release, then turn it back counter clockwise one full turn. This is the least amount it should ever be set at, or the least amount of creep adjustment. I prefer mine out further, as it is still a really light trigger...especially with a glove on.
By the way, nice looking Renegade. I agree with Muley Hunter on the 1 in 48 twist. I have one that shoots both roundball and Hornady great plains bullets in 425gr well with a 1 in 48 twist. I'd start with a .530 roundball and .015" patch, and a 70gr charge of goex ff and work up in 5gr increments from there to see what it shoots the best. Recover a few patches and make sure they aren't cut or burned through, you don't want any gas escaping by the patch when firing. I use a 70gr charge for target shooting roundball, a 80gr charge for deer hunting roundball, and a 100gr charge for the 425gr Hornady GPR's when elk hunting.