That’s really interesting.
Do you have a sense of why you lose more to rifles?
My first thought is that people might be overconfident with a gun and take chancier shots?
That is a really good question, I think there are lots of factors. As I said I only shoot deer with my crossbow when I know it is a kill shot, my crossbow will shoot within 1" out to 35 yards. We get lets of opportunity on lots of deer over a 3 or 4 month season so there is no pressure to rush. Gun or rifle hunting can be different, we have a short season, over 500,000 hunters take to the woods, there is pressure on the deer population, a lot of shooting is at greater distances in thick woodland (max 100 yards), lots of possibility for deflection and a bunch of the guys I hunt with fire 5 rounds a year!!
A 3 bladed broad head is typically 1.25" in diameter, the head and arrow carries a lot of impact and shock at triple the weight of a typical .308 bullet. Woodland white tail are real tough animals, a well placed arrow and large wound will cause them to bleed out much quicker than a poorly placed bullet. There is always an exit with a broadhead, that's not true with a soft point bullet from a medium caliber rifle, no exit wound and poor placed shots results in a poor or no blood trail, that makes tracking real hard in very thick cover. I'm amazed at how far a rifle shot deer can travel.
During gun season we often lose a couple of deer on my 400 acre property, with .308 or .30-06, I'm personally moving up to larger calibers or more energy and shooting things like .300 win mag (200 grain), 9.3x62 (232 grain), .375 H&H (200 grain) or .444 Rem (240 grain). I don't let anyone shoot anything smaller than 7mm. These heavier calibers and heavier bullets will guarantee a good exit wound and hopefully a great blood trail. Our woods are real thick and have a lot of thick swamp area with cover that is over head height. Ideally you would have a tracking dog or a thermal drone. We often get snow during gun season, this provides great tracking on a blood trail. Out of my deer hunting group of friends it tends to be the same individuals that lose deer. I've also made a shooting practice day mandatory, where my friends have to fire more than 2 rounds!
I find open hill and open field hunting that I typically do in the UK to be a very different game as you get to see clearly a deer that might run 60 to 100 yards. My UK woodland deer hunting has been limited but I'm sure you also have a risk to lose more animals. I shot in rifle clubs regularly over the years, shooting more than a 1,000 rounds a year to ranges of up to 1,000 yards, the average US woodland deer hunter has never shot past 100 yards and never checks zero or practices. There is also buck fever! In Michigan a lot of hunters go away hunting for a week and may never make it into the woods, cabin life with a group of guys can get a little rowdy, that is not my type of hunting.
As often stated a well placed shot is the most important factor, caliber and bullet type are secondary. I hate not recovering an animal, going out the next day and eventually finding it does not solve the problem as they are often found first by coyotes, foxes or buzzards.