Right, and some 9mm guns actually like .357 or .358 bullets better than what should be normal for them. My point was really just that you can't assume without testing, especially when it comes to something that might be used for something where bullet performance matters like self defense or hunting.
Didn’t Cor-Bon somehow “bump” up the diameter of the Sierra 115 JHP for one of their early 38 Special loads? I don’t know if a handloader could do that at home or not.
tnoutdoors9 AMMO REVIEW: 9mm 147 gr Federal HST in Calibrated Gel (2021)
https://www.youtube.com/watch?v=xQg_D7mcVRw