Here's my limited expereince using a X-Bow. Only 4 seasons worth.

I found that the broad heads that I was using with my compound did just fine. Those were Thunderhead 125's. I now use 125 gr. Montecs because they do print a tad tighter.

I practice with 125 gr. field points and fine tune with a couple of dulled Montecs. I have found minimal difference in the point of impact.

I find that as long as I am no higher than about 20' -25' of the ground, there is no reason to aim any differently than is I were on the ground, level with the target, as long as the deer is 10 or so more yards away. Very close shots, I do aim about 2" lower because in the past I have tended to hit high on these close shots.

I have found, just like with my compound, that only the downward angle of the arrow passing through the deer has to be managed. I cannot feel any less vibration nor have I noticed any appreciable reduction in the "slap" of the X-Bow regardless of the stuff I have tried. Right now I have only Limb Savers in place. Nothing in the string.

As far as distance ... I have bow hunted for about 48 years now. My most recent bow was a Matthews XQ2. I have found no appreciable increase in effective range using the X-Bow that I have now ... a Parker Tornado. My first X-Bow as a top of the line Ten Point. Same-o for it as well. The only advantage over the recurve that I broke into archery hunting using ... the compounds I have used ... and these 2 X-Bows is that in some cases I can manage to create a solid rest from which I feel more confident to make the longer shots with the X-Bow. But still ... for me, on white tails and feral hogs, about 45 yards is the outside I'll try. But that distance has always been the case and it may just be drilled into me now after these many years.