I run several varieties in my Sub 2000 M&P variant.
10 rounders by Promag run
17 rounders by Promag run
23 rounders built on a 17 Promag and a 10 Promag with Taran Tactical +6 bases run
17 rounders by S&W run
32 rounders by Promag ran initially, but fail frequently after being fully loaded for 2 weeks.
And, yes I modified my free recall nanny state mag to 23 rounds using a 5/16" drill bit to the dimple, plus aftermarket spring and base pad. I already had my 3 nanny state mags for travel in nanny States.