Jacketed .357 bullets are just that. Groove diameter are .355 iirc. So it's not that far off.
If they're a bit harder than the bullets originally were they might do ok at 1250.
Who knows
Printable View
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.
Yes.
https://www.youtube.com/watch?v=xQg_D7mcVRw
tnoutdoors9 AMMO REVIEW: 9mm 147 gr Federal HST in Calibrated Gel (2021)
https://www.youtube.com/watch?v=xQg_D7mcVRw