Hey guys I was just wondering what spine woodies should i purchase to shoot out of my 50# 74' Kodiak Magnum. I only draw around 27 inches, so I will be cutting the shafts around 28". I was considering purchaseing some of the 3 rivers hunter arrows spined at 45-50# would this be about right?

Your K Mag will be cut to center, so add 10 lb for a 28" arrow and 125 gr point, ie 55-59 spine.  Spine formulas aren't absolute but this should work well.  The most you would have to do is go up a touch in point weight.

I concur with Fletcher.

So are you guys saying i should order 55-59lb spined arrows? Wouldnt this be too stiff for a 50lb bow since the spine increases when cutting them?

For what its worth. I played around too long with over spined arrows through my bow. I shoot a 45# @ 28" flatbow, its cut 1/8 off center with a skinny string. I pull 29" so I have 30" arrows. I ended up getting perfection with a 50-55# spine w/ 125 gr points. Just my scenario, yours may be different. If your only pullling 27" you will lose a good 2-3#'s off your 50# bow, which I would scale to be sure it is a true 50# before I made a purchase. I would suggest 50-55#, or get a test kit first and save some head aches.

The static spine measurement of a shaft doesn't change.  It is a simple standardized measurement of the deflection of a shaft.  What is actually important is the dynamic spine of the shaft.  That is what varies with length, point weight, etc.  The challenge is to figure what static spine is needed to achieve the correct dynamic spine for a given bow/arrow/point/shooter.  Clear as mud, huh?

If you really want to nail it down, I have some test arrows that you can use.