Duty rounds in 9x19mm, M&P sidearms/BUGs....
The topic of good carry/duty loads for the 9x19mm or 9mmNATO come up often on firearms/tactics forums.
Search this message board & you'll see many good reply posts & indepth feedback on duty 9mm ammunition.
In general, I would buy or carry these rounds in the S&W Military and Police 9mm;
the Ranger T 127gr +P+ JHP, the Speer Gold Dot 124gr JHP +P, the CorBon DPX, the Hornady TAP, the Federal EFMJ, Corbon PowRball, Glaser Safety Slug(back-up/2nd gun), MagSafe SWAT 9mm(BUG/M&P compact).
The Remington Golden Saber JHP +P 124gr(bonded) can do very well but it may be hard to find(with regular open sources/non sworn LE).
Bonded handgun rounds are suggested because of the use with common auto glass & related material. I read a article that a state LE agency in the mid south documented approx 90% of the year's use of force/line of duty shootings involved traffic stops/auto glass, plastic, metal.
To me the Federal EFMJ, Corbon PowRball, Glaser Safety Slugs or Magsafe rounds are better for the M&P compact or a small sub-compact 9x19mm. The Winchester Ranger T 124gr FMJ(9mmNATO) could work also. Smooth feeding, clean ejection & deep penetration will be needed for your BUG or spare duty pistol magazines. PowRball & Federal's EFMJ loads offer these benefits.
In closing, I'd check your duty or carry rounds often and only carry well made factory 9mm ammunition on duty; no reloads or hand loads.
Stay safe & take care;
ClydeFrog