80 pounds is a very low draw weight for a crossbow and a very high draw weight for a standard bow
About 1485.
Crossbows load bolts into the center, which are pulled back by a winch. This eliminates the drawback of draw-weights. The crossbow is fired by a trigger.
A crossbow is a composite weapon, meaning it is made out of many parts. A regular bow, however, can be a single stick with a length of string, so the crossbow is harder.
Crossbows are usually a higher draw weight because a person of the same strength can wield a stronger crossbow because they can use legs as well as arms when bracing a crossbow, wheras a bow uses only the arms to draw.
150 lbs is 150 pounds of draw weight, in a bow I would say that you'd need a brear of a person to wield it. Fortunately, it is a crossbow you are talking about, but that is still too much for a child to draw. Try using a bow with less draw weight and let them build up strength so they can use a stronger crossbow when they are older.
30" is not a draw weight, it is a draw length. It is the length of the draw from the bow to the string when the bow is drawn.
It stands for Multiple draw lengths. You can change the draw length, but you have to provide the modules to do so.
Impulse XI 53 7/16 on a 28-30 draw length 56 3/8 on a 30-32 draw length
I have a 1989 Browning Accelerator Plus and I was wanting to adjust the draw length?
Crossbow, crossbow
The general rule of thumb is that one inch of draw length will increase your speed by approximately 10 fps. This will vary from bow to bow and depends a lot on the draw length and poundage being changed.