At 60 yards … a
20mph wind moves a 452fps/400gr arrow 1.58" which isn't enough to cause a problem unless you're taking a brain shot.

And 20mph feels like gale force winds when you're hunting. Know what?, the calculator shows the SAME drift for a 447gr arrow. Apparently if you're going to a heavy arrow to allay concerns about wind drift it really isn't a factor. Nothing wrong with heavy arrows if that's your philosophy, but my philosophy is "the faster, the flatter the better."
Increase that 40 mph plus, and even at 40 yards you better know as Steve said just what to expect! Add helical to it, and you just changed it even more!
Like SEW said, if you don't practice in the same conditions you hunt in,, your probably going to have incidents where your NOT PREPARED!!
Charts and ballistic tables are not set in stone, to many variables to get lost in the facts of their outcome! I believe in whatever you shoot, get it off a table and learn to shoot it, and that means in every condition,, and if you think a tree sways in a 20 mph wind, add some gusting to it, witness how much you sway standing unsupported! Trust him when he says it is important to practice the same way you hunt!
This deer was only 42 yards, but in a 35 to 40 mph gusts coming from the west, and taking the shot to the south of my position, I was well rewarded by understanding I needed hold off to the right into the wind,, I held at the very front of his chest and watched the firenock start wide and drift slightly more than I had wanted! But will assure everyone had I held the front of the shoulder a liver would probably been missed and nothing but guts. That would have resulted in hours of tracking and probably all for not!
I have seen even rifle shooters blame their scopes when they experience a POI change that is caused by the conditions and trying to convince themselves that a high powered CF can't be affected at 100 yards running 3000 fps or more,,,,,, BS sight in a left to right, then a few days later shoot in a right to left,,, and 20 mph can cause over 1" difference in POI, and those that continually chase it will never learn anything!
Apply that same scenario to a crossbow even at 450 fps and it can spell disaster, increase it to a 30 or 40 mph gust and see ya, you'd be extremely lucky recovering that deer taking a dead on shot with a 9" drift at 40 yards,, add rt helicle and your probably now high and more like 11 or 12 inches left of aim! PRACTICE LIKE YOU HUNT! get that contraption off the bags and shoot on bad days, that whats makes shooters shootist's!