Archery

Forgive me, I'm not well-versed in compound archery, but I do have an app to calculate arrows for recurve, which will also do compound arrows.

42# is that at peak?

With a peak of 42# and 31" draw, then you need an ATA speed rating of 358ft/s to use spine 340. I don't know if that makes sense, as speed rating is something I haven't heard of in recurve.

If you know the speed I'll put it in and give you a spine. The app I'm using is called arrows and is made by Marcel van Apeldoorn.

I used to shoot Easton 800 spine arrows when my draw weight was between 20-30#. With my Altus, my local archery shop recommended a 600 spine for my 43# bow. Currently using Easton Venture arrows. My archery friends have arrows which range from 400-320 spines with 45-55# bows.

I’m not sure how much the length matters beyond comfort/weight shedding since less arrow means lighter arrow. My shop cuts them to an appropriate length that works for me, so if your length works, the important part really is the strength of the spine and giving your old arrows a good flex to check em and make sure there aren’t any cracks. Don’t want anything exploding!

If you do have a nice, local shop, I highly recommend stopping by to ask for suggestions or getting your arrows cut down if needed!

Edit: Also, if it helps, I have a pretty short draw length too. I think it’s between 27”-28”. If you check out “arrow spine chart” from different manufacturers, they also have spine recommendations depending on arrow length.