I was playing around with Lil Gun, at my buddy's house, and after a few rounds, his dogs left for another county, literally

. They ran off, and later the neighbor called and said they were at his house. I didn't notice any difference in the Lil Gun and the Reloader Seven loads I normally use, but apparently the dogs did. They hit the road..............
I can probably save you a lot of work. Use 18.5gr. of Reloader Seven and any bullet from 35 to 50 grains. Plumb near guaranteed to shoot extremely well, even if it's not really fast. Heck, if you want fast, shoot a .22/250. That load SHOOTS, ask Glen (One EN)

and I think Jerry uses it, too. I stole it from a buddy who owned a custom Fireball, built on a Howa action w/1.25" diameter PacNor barrel. His gun liked it bunches. It's generally good for a half-inch group with SPSX bullets in my CZ.