It's been 357sig for almost 20 years for me.

It's always fun when we go to any training session. You always hear pop, pop, pop, pop then it's our turn, boom, boom. everyone stops and looks over to see what we're shooting. Then they all want to try.

At one course I was knocking their steel plates over from the longest distance on the range. They told me to stop shooting their plates.

5.7X28mm but I do not own one because of cost and availability.

9mm in my duty 226s, off-duty Sig Pro and backup 938. "good enough" for the FBI , good enough for me. Most of our folks have moved to it.