I did a little checking this morning.
I have three different loads made up.
All are two ball/bullets.
1st Two 36 cal lead balls, sized to .357.
2nd A lead Makarov bullet and a 36 cal ball, both sized to .357.
3rd A Hornady JHP Makarov bullet and 36 cal lead ball, both sized to .357.
I remembered why I stopped using three balls. If I used a 36 cal black powder ball sized down to .357 the balls were still too big to stack 3 in a 38 case and the total weight was also too great. I believe I did successfully use this load in .357 cases.
If I used three smaller balls on the 38 I still couldn't load to standard muzzle velocity and the accuracy suffered.
So in order to get max velocity and accuracy (but with a little spread I went to bullets like the 95 grain 9x18 (Makarov) LRN and JHP, paired with a single ball or short lead SWC bullet.
This way the individual bullets were still fairly heavy and accurate, while keeping the operating pressure in limits.
The velocities are as high or higher than most 38 loads from a 2 inch barrel and the bullets are up to 95 grains in weight, so the load should be effective.
10 centered holes from a 5 shot gun isn't bad.
Here's a couple targets I shot this morning.
I only shot close up, 7 yards, since I think the load's primary use is for shooting across the living room.