+1As noted above there are so many factors. What I would say is take a look at this site and then think about your draw length and bows IBO to figure out what is realistic.
Kinetic Energy and Momentum Calculator | Realtree Camo
This Realtree calculator calculates your kinetic energy and momentum for you.www.realtree.com
I like to find that sweet spot where my arrow weight and speed create the most efficiency. I am only 5’8 so my draw length works against me. I will never see 300fps and still have an arrow that is heavy enough to have good momentum and high kinetic energy. So for me that sweet spot is 478grains at 280fps. I was able to achieve that with a turbo cam hoyt rx3
my next step was then the arrow. I could get to 478 grains so many ways. I am a firm believer in FOC and wanted to be in that 16-18% range. I could simply have gotten an fmj arrow and thrown a 100grain tip and been close to my desired weight but that didn’t do what I wanted. As I went down the rabbit hole with my arrow build I also Wanted a wrap and 4 fletchings from aae. All of this was adding weight and in some cases to the back not the front of my arrow.
In the end I settled with an easton hexx arrow bc at 6.9 gpi, I had the freedom to add weight where I wanted. I have a 75grain insert, 125 fixed blade head, 4 fletched AAE max stealth vanes, a wrap and nock and my arrow is what I think is the most ideal set up for my draw length hunting elk, moose andhonestly pretty much any game I want bc my bow is producing around .59 slugs of momentum and about 83ft/lbs of energy.
as for spine I am at a 330 spine bc I have a turbo cam, and my arrow spine is a little stiffer than advertise because I cut them so short at 27.25”
sorry for the rant but there is some insight as to what works for me hunting elk. Check out the archers advantage program too. You can do so much from spine selection or arrow configuration to sight tapes etc.
