Spines

[Scattergun2570]

So I was looking at the specs on my Legacy 1916`s on Eastons site. It lists the spine deflection @ 28" as 0.623. So being I cut my arrows to 28 3/4",this means it`s an even higher/weaker spine right?  Now,,here`s where it gets more complicated. I was thinking of trying carbons. So being Easton 1916`s are 0.623,does this mean I need a 600 spine arrow? Some clarification please!

[Scattergun2570]

ttt

[Scattergun2570]

ttt

[SlowBowinMO]

A .600 carbon should tune well in a bow that likes a 1916, but as with all carbons, I highly recommend to leave them long to start and cut slowly.

[The Whittler]

I 2nd Braveheart.

[AWPForester]

I would suggest the same.  I will say you are likely to find that if the riser is cut to or past center they are going to tune just fine with your normal trim amount even if it is short. Probably do the same with a traditional longbow riser as well because their wide spine designation is no mistake.  They really are very forgiving and easy to tune.  But start long with saran wrap around the insert so you can pull it out and trim until you have your normal desired trim or it gets outta whack.  God Bless

[agtex42]

The spine deflection being listed as .623 @ 28" simply means that the deflection is being measured between two points that are 28" apart rather than the AMO standard of 26".

600 Carbons are tricky because they're often only sold in small diameters (9/32 or less) and generally only run around 30" full length.

Cutting them down will stiffen the spine and you're somewhat limited in your options of tip weight if you want to keep your field points the same diameter as your shaft.  That being said, I've never had any issues tuning them on my lightweight bows but your results may vary.