OK, my favorite 45acp load... For paper, or perpetrator?
For defense- Winchester 230gn HP from Midway. A very accurate HP.
For paper- My Bullseye load is a dream to shoot.
Bullet- Lyman 452460 SWC mould (~200gn bullets with 98% wheel weights, 2% linotype. Water quenched after moulded. Yes, these bullets are hard. Lubed and sized at .452" through a Star Lubrisizer. Lyman pistol bullet lube.
Powder- Bullseye, 3.6gns. (A lot of people push a 200gn bullet with 4gns.)
Case- WW
Primer- CCI300
Recoil spring- 15lb. (This load will not cycle a full length/tight slide with a 19lb spring)
This load is very accurate through my Kimber Custom II. This load is very close to duplicating H&G #68, with 4gns of Bullseye powder, type load/target results often viewed as the standard bullet in Bullseye shooting.
Why is this my favorite load? Because I create each and every one from start to finish. Because they go down range right where I point them.
I should probably put in a disclaimer that your mileage may vary, and that you should work your own load up, for your pistol. I will suggest that your Ultra should shoot any of the 200gn LSWC's just fine. For plinking. For defense I suggest a good hollow point of 225-240gns with the correct portion of pistol powder that will make the bullet perform properly.
-Steve