I think 230 grain bullets at moderate velocities from a .45 Colt might be a little light for deer at 100 yards. It can do it, I'm sure, but I'm not sure how reliably it'll happen.
Another concern is bullet design. 230 grain bullets in .45 caliber are commonly round nosed, and those aren't a good choice for shooting deer. A big, wide meplat will work a lot better for dropping a deer quickly.
I shoot 300 grain bullets from my .45 handgun at around 1250 fps (Ruger only load). The same load from my '92 Win leaves the barrel at around 1600 fps. These will kill anything that walks in Arizona.