It is enough - barely. Don't expect the deer to leave you a blood trail. Any blood loss will be on the entrance side only. .45 is my favorite cal for target work, and when I only had one gun, for hunting too. After killing some deer with .45s I had one that was hit through both lungs taking off the top of the heart. It took four friends and two hours of grid searching to find it. No blood trail, no visible exit wound was found till the hide was off. This shot was at 25 yds. I have since switched to .54 or .58 cal rifles. They make deer leak badly from both sides, and I haven't had trouble tracking one since. Keep your shots inside of 50 yds and be fussy. Stick to broadside or slight quartering away shots like our archery friends need and you wil probably be fine.