A friend asked me a question the other day and I didn’t know what to tell him. Can a 9mm (.355) be loaded into .38 Special brass which takes a .357 slug? I told him I wouldn’t, but I’d ask around. Any advice?
If the base of the 9mm bullet is kicked hard in the seat of the pants it should fill the bore when fired. Meaning loads from midrange to max should expand the 9mm bullets.