First Id take a 2nd look at buying a new S&W Shield 9x19mm ...
S&W had a factory recall of the line.
In carry rounds, Id look at these top choices for 9mm(9mm Luger);
Corbon DPX, Hornady Critical Duty +P, Ranger T 124gr +P bonded or +P+ JHP 127gr, Golden Saber 124gr +P JHP, Speer Gold Dot 124gr +P JHP, MagSafe SWAT, PowRball 9mm, Federal HST 124gr +P, Winchester PDX1 9x19mm.
I'd suggest packing 9mmNATO FMJ or maybe Buffalo Bore Penetrator 124gr +P+ FMJ 9x19mm for spare magazines. You want that 100% feeding/cycle & with the Buffalo Bore load, you get extra punch if required.
See;
www.sgammo.com www.natchezss.com www.midwayusa.com www.buffalobore.com www.magsafeonline.com www.shopcorbon.com .
Clyde