I have never checked velocity at 25 yards but at 100 yards with 110 gr I get about 1200 fps. Mv is about 1800fps Hornady 530 prb .018 patch remington #11 cap. Your 50 cal should have a little more velocity than my 54.
I think Lyman recommends a maximum load of 90 gr on the 50 cal versus 120 gr for the 54 don't they?
You could switch to 3f instead of 2f. It will increase pressure,but with the faster burn rate it should boost velocity a little also. I am sure someone on here can help you achieve the results you are looking for. There are some great guys here. Also Welcome