well I did a little bit of searching and it seems crossbolts are a bit heavier than I originally thought. I figured because of the shorter lengths the weights would be less than common compound set up. They are actually pretty close. Around 325 to 450 grns or so depending on what they are made of and how long they are. That is pretty much what you would see in compound bows.

But I did find that while there are a few crossbows that shoot fast, like 345 fps or so that is not the typical performance. And those are usually with lighter 350 grn bolts 175-200 lb draw weights, and possibly longer rails for a bit more power stroke. The average seems to be around 300 fps, either a bit over, or a bit under.

While I was a bit off on the weights there are still some modern bows that can compete with that.The Black Night II comes to mind. I'm sure there a few others as well.

You might want to dust off your check book. There might be a few on here that take you up on that offer. And that doesn't even include the macho guys shooting 90+lbs of draw weight, or 32 inches of draw length.

Arthur makes a good point about point of aim and trajectory as well.

I'm going to play with a ballistics calculator next to see what sort of speed you would need for that kind of trajectory.

Paul