So another thread inspired me to start this one so I don't hijack the other one. A question for the 500+ grain hunting arrow folks...and when I say that, this is what I hear a lot for a deer setup let alone an elk. I've always used fixed, as mechanicals aren't allowed in Idaho. I'm not understanding the super heavy arrow "craze" that I keep reading about, but after reading some comments in a mechanical broadhead thread perhaps it has to do with mechanicals needing the momentum to go clear through with the large cutting diameters they have? I do realize a lot of folks can and do use mechanicals. My primary archery target is elk, I usually muzzleload for deer. I've ran regular 100 grain Muzzy's with a 400 grain-ish arrow for over 20 years (I have no idea what my old baseball bat diameter Easton aluminum 2512's weighed that I first started out with, but they were plenty heavy). There's been some different hunting arrows I've used since then, but my current arrows actually show 385 grains on the scale. I've shot 4 elk with that setup so far...3 were broadside shots that resulted in complete passthroughs and one was quartering away that stopped in the far side shoulder. I like to try to keep fps around the 280 mark...I've always shot 70 lbs, just dropped down to 65 last year... I am a fairly short draw length at 27.5 with d-loop so I can't do that with an arrow much over 400 grains with past bows. I've had a few bows that were under 270 fps and one that was 250 fps. My current bow is quite a bit faster than I'm used to, coming in at 306 fps. I have had to judge yardage on the fly on several elk, it just isn't the same as sitting in a tree and waiting for a target to show up, so I've always wanted to maintain some decent speed. Anyway like I said above, the only time the arrow doesn't go through them like warm butter is when the far side shoulder is hit on a quartering away shot. Every broadside elk I've shot has resulted in the arrow "pinging" down through the trees behind it with a fair amount of velocity still in it. Last year my brother-in-law shot a whitetail buck at 30 yards with an arrow weighing about 375 grains (Muzzy 100 grain BH) and the buck turned before the arrow arrived. He hit it at a pretty hard quartering to angle with the arrow going in where the neck meets the body and it actually exited THROUGH the far side front shoulder. Hit an artery or something because it was a blood bath for the 75 yards that deer ran. I couldn't believe it went through the shoulder, but deer are quite a bit less dense than elk. So why do so many push that a 500+ grain arrow is needed for deer? Shooting through shoulder blades on a regular basis? Huge cutting diameter mechanicals just don't penetrate well? What is YOUR experience that makes you feel the need to run a really heavy arrow? I look forward to hearing your stories.