RE: KE reamains constant?(roughly)
A. Draw length.
- Longer draw length means your arrow will need to be fatter shaft which means it will be heavier which means... Well, I'm not sure what that means. Typically, a heavier arrow will not change KE by much but if this heavier arrow is shooting the same speed as the lighter arrow at lower poundage, then yes, increasing draw length will increase KE. Whether it is a significant difference, I don't know. And I could be wrong on all that.
B. Draw weight.
- Increasing your draw weight will shoot the same weight arrow faster giving it more power. And vice versa for lowering poundage. Draw weight will indeed "significantly" change KE. So b is the right answer.
C. New bow.
- If the new bow has a faster AMO or IBO speed then it will have an increased KE from the slower bow using the same poundage, arrow and arrow weight and draw length. Although the increase in KE will not likely be significant.
Nic