Well what I am in need of is standard small pistol primers, if you have any to trade or sale let me know.I was by no means recommending using magnum primers in the .357 sig. In fact, I would tell you to not do that. However, I do know of folks that used magnum in 9mm back during the Sandy Hook primer shortage. I did not do that myself.
Since we were on the subject of interchangeable primers I was saying you can use CCI small pistol magnum in placed of CCI small rifle. That will most certainly not cause any pressure increase.
Thanks,
Rosewood