Try this with a 9.3 - Hint: they don't make 0.366" dia pistol bullets.
9mm Makarov is .365". It is close enough to shoot well in my 9.3 bore. Moreover, one can always seat a Mak JHP backwards if the 9.3 bore is a little too generous. The HP becomes a miniball type skirt. .366 meplat is a wicked wad cutter. May not feed from the magazine though.
Learned something new . . . What powder/velocity? W-231 is my powder of choice with pistol bullets in the Whelen at around 1,200 fps.
Out of my 9.3x57 Husqvarna 146
95 gr Hornady Makarov bullet 13 gr Red Dot (C.E. Harris "The Load") CCI 200 necked up 8x57 Prvi Partizan brass IIRC FPS around 1600.
I also use combo as a fire forming load for new brass. Squirrel head size groups at 25 yds.
