Last season I shot a doe with a 170 grain Lyman 311041. The bullet went behind the left front leg and out the far shoulder, dropping the deer instantly. I thought I might develop a load with the 120 grain Lyman 311008 that would be effective on deer and not bruise my girlfriend's shoulder. After some load development I settled on 18.5 grains of AA#9 with a Rem. 9 1/2 primer and a PC'd 311008 for slightly over 2200 fps in my Marlin 336. Accuracy was 1 1/2 to 2 inches at 100 yards, and POI was the same as my 170 grainers.
Fast forward to last Thursday. I spied a small buck bedded under some pines at around 75 yards. Taking a rest, I was able to pick a spot on his shoulder as low as I dared and sent a 311008 his way. At the shot the deer flipped over on his back with his legs in the air, then rolled onto his side. After a few seconds he tried to stand up but only his back legs were working. I thought about shooting again, but his back legs soon collapsed. He struggled a few more seconds and then remained still. As I approached him I could see the bullet hole exactly where I had aimed. I field dressed him and discovered that due to the angle he was lying at I had only hit one lung. No doubt if I had been able to hit both lungs he would have expired more quickly. I hung him up in the barn until today, and after work I got busy removing the hide.
I was expecting to find the bullet inside the deer somewhere, but such was not the case. I found the 120 grain bullet had gone straight through both shoulders, leaving utter devastation in it's wake. Holes through the shoulders were impressive, with chunks of broken bone and thumb sized holes through the meat. Entrance hole in the hide was about 3/4 inch, and the exit hole on the other side was a half inch. I was impressed! Not a large deer, but with limited time to hunt during our peak season at work I was thankful for the meat. I feel this load is entirely adequate for deer at woods ranges, and recoil is light.
I have yet to recover my cast bullets from an animal, and I'm not sure if I'm getting any expansion with my PC'd COWW alloy, but I like the results I'm getting on game!