I'm also planning to try increased loads, 110, 120 and 130 gr Pyrodex RS under the FPBs. If accuracy is maintained with 130 gr, I'll have a 150 yd load: 2" high at 50, 2.5" high at 75, zero at 125 and 3.5" low at 150.

Not too shabby for a 350 gr slug.