The current factory offerings tend to run toward the sedate pressures favored by the CAS folks.
The original 100grain@1500+ for rifle isn't likely to be found..If it is, most likely it'll a couple, or three, decades old.
It isn't History yet, but like other original BP loads, the commercial factories aren't likely to produce loads that equal smokless pressures in guns that may be used in BP guns.
I have a 32.20 Mdl '92 (smokeless), but have not been able to find any factory ammunition that is the equal to the offerings of the 60s.
The newer stuff though is quiet in a locked breech rifle. You can snipe at crows w/o the neighbors getting upset.
Trajectory isn't much different than a thrown baseballl. Slight exaggeration, but you get the idea.
salty.