I used IMR4198 in medium velocity loads for my 18 inch barreled Persian Mauser.
I forget the exact charge weight, but it was over 35 gr and less than 40 gr.
The cases got shorter from base to shoulder with every reloading when neck sized only, so the charge I was using must have been too light to fully expand the case after it was driven deeper into the chamber by pin strike and primer discharge. The charge should be a tad higher than I was using, but I can't say just how high you could safely go.
The muzzle blast was rather mild compared to full power loads, the 4198 powder burns more throughly and cleanly in short barrels than other slower powders.
Stated velocity of that load with a 170 gr bullet was well over 2000 fps, around 2300 I think it was.