I could probably say this another hundred times and I doubt you'll get it. I'm not saying you "have to" or "need to" use a heavy arrow. I'm saying it's the best way. If you hit the shoulder, the heavy arrow has a chance to get through and kill the animal, the lightweight one, has almost no chance. Don't tell me that good hunters are immune to hitting a shoulder. S..t happens and it happens to everyone who has taken enough shots.

As for trajectory. It's a non issue at normal hunting distances. In fact, it's a non issue at any distance if you have a range finder or know the distance. In fact, heavy arrows with high FOC are preferable the further out the game is, because they fly more true. They are far more stable in wind. Heck, there are guys using longbows at 40+ yards and shooting tight groups. They don't even use sights and trajectory isn't an issue with them. How on earth can a guy using a compound with sights have a problem at normal hunting distances. He can bring a range finder, pace off the yardage in advance, or even practice until he's real good at estimating.

If trajectory is an issue for anyone, they really need to rethink how they prepare for a hunt.