Beeman spines

[trapperDave]

whats the spine of the 300,340,400,and 500?

Is that number(ie340) the actual deflection?

[drewsbow]

yep

[Bill Carlsen]

On my Scheib spine tester here is what I get using 13" centers. You have to remember that the deflection given for compounds is not measured the same way...I do it the old fashioned way using 13" centers and a 2# weight....as I have since about 1955 or so. I think that is what  you are really asking for.

300 = 110#

340 = 95#

400 = 85#

500 = 65#

[Old York]

"whats the spine of the 300,340,400,and 500?

Is that number(ie340) the actual deflection? - yep"

So the 0.300"...0.500" are the deflection values using 28" centres & 1.94 pounds?

[trapperDave]

Thanks Bill

[Bill Carlsen]

Old York: I think your question is the answer regarding the "new" standards for modern equipment. The old fashioned (traditional) way of measuring spine is what I described. When discussing spine, at least among trad archers, you need to be careful about what you are really talking about.

Trapper Dave: The spine tester I have has been around for many, many years. I didn't use it much when I shot aluminum but since the compound came along, when making wood arrows and when comparing carbon to carbon it has been invaluable. I am glad I  hung onto it.