That's a stout dose.
I'll start quite a bit lower and work up.
You killed many critters with that load?
How's it do on game?
Hogdon has load data for 180 grain 357 with 15.0 grains of lil gun pushing 1422 fps, but that's out of a 10" barrel.
My buddy that shoots 350 legend (essentially a 357 max for AR15s) loves the stuff. Might have to try that too.
Dang, hornady's got alliant 2400 doing 100fps faster than h110.
I've gotta get me some of that.
They show 1250 out of an 8" python with 12.6 grains of 2400.
That'll be skookum with another foot of barrel
Lil Gun will get you top speed with 158-180gr bullets in your carbine. With heavier weights 200+, 110/296 has worked better for me.
That's with a 180gr Nosler Partition. The 180 XTP is shorter and far less "sticky" in the bore, and 16 grains of Lil Gun is still fairly mild with that bullet, in my experience. My preferred load is 16.5 gr Lil Gun with the 180 XTP.
It's not stout. I've gone up to over 17 gr of Lil Gun in the shorter cartridge OAL in the rifle (the 180 XTP has two crimp grooves). 16.5 is just a better all-around load for rifle and handgun.
Have only killed one deer with the 180 XTP out of the 20" rifle, about 80 yards nearly broadside. In the ribs and clipped the humerus of the off-side leg. Deer flopped forward and hit the dirt kicking. Was dead when I got to it. Tested on water jugs and 1/2" OSB: bullet went through 4 pieces of the ply spaced through 10 gallon-size water jugs. The bullet was in the 11th jug and perfectly mushroomed, weighing exactly 135 grains (75%). Have packed that combo for elk in the timber but the elk have not cooperated. One of these years. I'm sure it would hammer any deer walking, and wouldn't hesitate to use it on anything I'd hunt in the US, given a range limitation.