Some other things to consider...,
I try for a lung shot, not a heart shot. I like to eat the heart, and a proper lung "hit", which is through and through both lungs and out the opposite side, never had a problem putting down the deer. After seeing the results of a "shoulder shot" when the deer is facing the hunter and is "quartered" (standing at a 45 degree angle)..., I am willing to try this type of shot placement, but haven't as yet.
I have found that bucks tend to go farther than doe when fatally hit. Now that's from four bucks and seven doe over the past few years. Perhaps a good sample; perhaps not.
Remember that steep angles, like shooting downhill, will change your point of impact vs. what you get at the range which is level.
After you shoot..., reload and wait at least 10 minutes. Some folks like to wait 20 minutes. I like to set the reloaded rifle aside, and smoke my pipe. Once the pipe is finished and out, I go looking for the deer. WHY? Well suppose, for whatever reason, you had a mortal hit on the deer, but not as quickly fatal as normal? You reload and go after that deer inside of two minutes, and it's not quite dead yet..., it bounds off and makes tracking and finding a whole lot more difficult. I lost a buck several years ago by not waiting. He bounded off onto another's property, and by the time I was able to get over and ask about looking for it..., another fellow had found it and tagged it, and was taking it home. Oh well, live and learn.
60-80 grains is fine for your rifle for taking deer out to 100 yards, as long as it shoots straight with whatever powder load you use. Once you have verified that it shoots well with a specific load, trust the rifle. You should get a whopping big hole in the deer, and a good blood trail. But..., if you don't or if you don't quickly find it..., don't assume a miss (as others have pointed out). Trust that you hit it, and thoroughly search just as you did this time.
Don't just look at the ground. I've seen where the deer was hit very well, didn't leave a trail directly on the ground. When I found the deer, I realized the deer had been coughing a large amount of blood on the bushes about 3 feet off the ground. My head was down and didn't see it at first.
Deer when hit will often go downhill, and/or take the easiest path. If the blood seems to peter-out and you have a choice, try the easiest path from that point to search for more sign, first.
Good luck next time. OH and as for the rifle..., bag a couple of deer with her and you'll find out she's not too bad to carry after all.
:grin:
LD