Decent carry-defense loads in .45acp...
For a single action 1911a1 type semi auto pistol, I'd look into these brands/weights;
The Speer Gold Dot 230gr JHP +P, the Hornady TAP or Critical Defense load, the Corbon DPX, Thunder Ranch, PowRball, Glaser Safety Slug(home defense), the Remington Golden Saber 185gr JHP +P bonded, the Winchester Ranger T bonded 230gr JHP +P, the Federal EFMJ(expanding full metal jacket), the 230gr or 185gr JHP +P from DoubleTap Ammo.
I'd only use factory made high quality rounds for carry/duty/protection. No reloaded or hand-loaded .45acp rounds.
Round or "ball" type loads should work best for cycle/feeding in 1911a1 series single action .45acp firearms.
PowRball, EFMJ & milspec factory ball rounds(230gr) are a smart idea for spare or 2nd/3rd pistol magazines. I follow the concept of 100% feeding/cycles with a back-up or spare .45acp mag. A misfire or jam is NOT what you need when bullets are flying at you!
FMJ or milspec ball rounds are good for training & marksmanship too so you'd be conditioned to that wt/recoil/design with the S&W .45acp.
For buying details/prices see;
www.shopcorbon.com www.cabelas.com www.sgammo.com www.sportsmansguide.com www.doubletapammo.com .