Might see if .38 brass will work. Not sure if the brass can handle the higher pressure though.
I believe, but can't confirm right now, that .38spl brass is thicker than 9mm. (wall thickness)
Chamber is handling pressure anyway, not brass. Think 5.56 or .308.
Did some looking at the books over the weekend.
Mine say a 38sw is .001 diameter larger than .38 or .357.
I still think the round would work.
They should. My step dad used to shoot 38 S&W in his S&W Mod 10 38 Special. Don't know why he did that. He may have thought they were the same.
I've done it too.
The .38 cal lineage is impressive, and most any rimmed .38 will work in a .38spl or .357 mag.
Bigger variances in rim thickness than any diameter variation.
Wadcutters and semi wadcutters don't feed. At all.
Ran the powder charge up to 3.5gr of Win 231 for a velocity of ~750-800fps.
It's not real consistent at this point due to variations in seating depth. Currently using a .380 seating die and it's more about feel than setting the die. Next step will be 3.9gr and then a slow work up from there.
Absolutely no signs of pressure at this point, pretty mild recoil.
Different caliber, BUT, Semi-wadcutters feed just fine in my Henry Big Boy in .44 Mag.