I have a Browning Carbine set up with a Lyman Peep.
200gr Hornady flatpoint with IMR4350 and at 100 yards sub 2 inch groups all day long.
Very pleasant to shoot as well even with the metal plate.
I just grin bigger and bigger every time I shoot it. And it bowls deer over rather nicely.
how many grs of IMR4350 are you using?