With a PRB (.530 ball/.016-.018 patch) in the .54 Renegade I used from 60 to 90 gr ffg Goex and always had good accuracy.

BTW - 60gr ffg and head shots on squirrels is a lot of fun.

I haven't had a chance to get out to the range with my newly acquired .54 Renegade but plan to do so soon.
What can be expected with T7? It's all I have on-hand currently and Pyrodex is scarce in my part of the woods. I have hoped to shoot it.

mjac, I found load development more finicky with T7 because it had a tendency to blow the patch. It shot OK for me once I found the powder charge/patch/ball/lube combination the gun wanted. But not as well as either Pyrodex or GOEX, both of which were more forgiving. With T7, increasing the amount of lube over what I used for other powders seemed to help.

Semisane...I probably haven't used T7 nearly to the extent that you have, but I noticed blown patches while using it in one of my .50's that I normally don't have any trouble using GOEX FFF and a .015 patch. I thought it was because the patches I was using had been lubed and stored for some time and possibly the lube had dried out some. I rubbed more lube (I believe it was Ox-Yoke 1000 plus) onto the remaining patches and didn't observe any more blowout or "burnt through" patches. That led me to think that if I was gonna sit down for a session with T7 again, that I should lube the patches just prior to shooting or maybe try a thicker patch...BPS

T7 is all I shoot since that .54 Renegade. I've read posts here about blown patches,etc but, honestly, I have no such issues & even reuse patches successfully.

However, I rarely shoot more 75-80 grains.

I have the better part of a pound of T7 3F left and when it's gone, I probably won't buy any more of it. In my guns, I have not seen any significant advantage in using it, at least not anything that justifies it's cost. I get good results from Goex and Pyro and that's probably what I'll stay with. I also thouroughly clean my guns when I'm done shooting so any claim that T7 has about being non-corrosive is moot ...BPS

I have shot TC Hawken and Renegades since 1980 and built quite a number of Hawken rifles myself.
I set them up the old way; I load 25 grain loads and shoot them into old pillows or cotton batting, I start out with a good heavy ticking patch and when i get a ball that show the impression of the cloth strongly where the land were and weakly where the groves were I start working on the load In a 54 I start with 90 grains and work up to 120 the I go back to the best group and see if I can consistently duplicate it.
If the patch and ball combination do not fit the barrel right it will never shoot really well. After the gun is broken in I start checking the patches if I find cuts in the patches I JB it with 100 strokes.I use Goex Black or RS Pyrodex and RWS caps because this combination has worked well for me. I have never been able to get a .530 ball to shoot up to my standards all my guns but one ended up with a .535 ball the exception took a .540. It is not easy to get a 2.5 inch group with iron sights at 100 yds and I can not do it any more because my eyes are not what they used to be but I could do it until I was in my 60's, now I have to use a scope. If you ever have the opportunity watch the Hawken and Mountain man matches at Friendship IN, you will see the guys shoot groups that are only 17 inches string measure. [ That is each ball is measured from the X and the measurements are added together.