In developing a good deer load for my .38-55 H&R Model 1871, I've discovered that adding a milk carton punch-out wad over the powder followed by 1/4 square of rolled/folded toilet paper filler reduced the 50-yard group to 1". Both 25 grains of IMR 4198 and 25 grains of N-130 shoot the .381" 245-grain powder coated Slippery Bullet to the same point of aim at that distance, much better than the 2+ inch group with just the powder load alone. I think I've found my deer hunting load. Next in load-development line is my Martini .219 Zipper.