Well, here in NY we are limited to ten unless they are pre ban mags. So, I have some guns that could use standard cap. and the big oversized mags as well, but most of my current non-wheelguns weren't even invented until after the ban so pre ban mags don't exist. And, the ones I do have for which pre-ban mags might exist are pretty much all single stack .45s which typically only go to a max of ten anyway
I do have some pre-ban taurus mags though, so I guess its
High: Taurus PT99 - 15+1 ( I think ) and
Low: various J Frame S&Ws at 5 rounds
Yeah, I have never been concerned with the capacity of my pistols. I just thought this would be a fun way to waste some time. My next purchase is only going to hold 6+1, it'll be a RIA compact. One of these days I might get super high cap range toy.