Alternate powder for 45 colt.
I know unique is a good powder, but had some position sensitivity issues with it last time I went shooting. A standard pressure load, going in my Uberti breaktop. I was shooting, Lee 230gr TL FN, using lee tumble lube, 9gr of Unique, middle of the road sort of load. Shooting over the chrony, they were all over the place, could feel them, tilt the gun back each shot, and they even out. Had the issue before with an 1858 conversion, so went to trail boss for that, but prefer a bit more velocity.
Maybe a different powder? Have 2400, green dot, universal, AA #2, AA #9, 800x, 5744, clays, Autocomp, Shilouette, blue dot. Not found blue dot to be very good at low pressures, unburned powder.
Or some sort of filler to keep the powder in the back?