I had loaded 15.0gr of 2400 behind some 125grJHP. This is just below the recommended starting load, but someone else had mentioned using even less than this so it seemed ok.
The first group shot was not bad; about 3" at 20ft.
My friend Mike, (a fellow student,) took turns shooting cylnders full and we both agreed it was still a peppy little load for "minimum starting".
He was grouping well, too, though he tends to shoot low and left as I did when I first started with this pistol. (SA revolvers tend to tell on you.)
Anyhoo, after two shot groups around three inches, I shot this one:
Tough to tell from the camera in my phone, but I'll fill you in.
I measured at home with the calipers and got 1.980" from the furthest two holes, in the center of each. Three in the middle cut the same hole.
Yes, you read that right, I ballantined the suckers!!!
I'm still a little to the left, but I will adjust the sight a bit to compensate.
Once I settled in on this shooting session, I repeated 2" groups until we were out of ammo.
Ha, even though I'm a novice, I had two other guys at the range come over and ask me if I had some sort of technique to do that.
I like 2400 a LOT.
It's crisp, and burns clean!
I had some unburnt kernels laying around when I was done, so I'll try 16 and 17.0 gr next.
If I still get groups around 2", I'll load them hot -somewhere around 1600-1700fps and then just find what groups best and go with it.
Reloading is easier and more rewarding to me when stick with a recipe and practice!
a couple of things to watch 
