Free: Contests & Raffles.
There is for sure a larger margin of error. Not by any means saying rifle hunters are more elite or better or anything like that. Put a arrow in the right place animals die with a quickness. But like you said the margin is smaller with a arrow then a large caliber rifle. As far as wounded game living. I know from personal experience that wounded game can live on but I don't feel it should be an excuse to keep hunting, because plenty of wounded animals don't make it.
Npaull I have had the luck to have taken many deer and an elk with multiple weapon types. Your comment about the anatomy makes no sense unless a quartering too shot is taken. I have shot animals 6" back from the shoulder with a firearm broadside. 40 yard pile up double lung. My guess is you tend to high shoulder shoot. Sucks to loose that much meat, also neck shots in my book are lower percentage, your just using shock. Seen a few of those animals get up and keep trucking.
We had an issue last season. My wife has a 22" draw and was shooting 45 lbs. I built her some 480 grain arrows with an 18% FOC, because i read on the internet that they deliver more energy and penetrate better. Long story short she took a shot at 11 yards on a spike last season. It's dead, i know it is. We never found it. The blood trail was incredible, followed it through a patch of thick brush, easy to follow. Followed it all the way out into a clear cut... where the blood disappeared. We searched for 4 hrs in the dark. We then searched for 3 hrs the next day with extra help. Never found it. Found her arrow and it only got about 5 inches of penetration with a 2 blade cut on contact broadhead.I talked to a lot of people about it, that know far more than i about arrow building. They all said the same thing. Too front heavy, and too heavy period. She now shoots a 380 grain arrow at 10% FOC but we haven't gotten to test them on an animal yet. I can tell you they fly better and penetrate our targets better but the true test has yet to come. She did kill a deer last year with the same arrows at 7 yards. Perfect broadside shot, double lunged, but i still was less than impressed with the penetration she got, so thus the new lighter arrows were built.