Help With Stus Calculator

[gio tundo]

I don't know how to download or use the calculator, can somebody maybe type in this information for me or just help me out. I just bought a 66 pound at 28 inch critter gitter. I draw a full 28 and want to shoot 145 grizzlys. My feathers are 5 inch. All my other bows are in between 50 and 55 and I've been shooting 55 60's out of them with a 125 grains heads and they shoot great, what I also don't get is they shoot perfect out of the 66 pound bow. Can someone help?

[gio tundo]

Oh and my arrows are 29 and half inch.

[JamesKerr]

You don't have to download anything just scoll down the page and you will find a link that takes you to the calculator. As far as your arrows they sound overspined for your 50-55 pound bows but close to your 66 lb. critter gitter.

[Shawn Leonard]

Wood 29" arrow with 145 grain head I would say 80-85# spine would have ya darn close, you may get away with 75-80# spine. I also have to disagree about your 55-60's out of the other bows being overspined, even if they are LBs. The old rule is add 10#s to bows weight for modern LB and than add 5#s of spine for every inch over 28"s in arrow length and 5 more #s of spine for every 25 grains over 125 grains of point weight. Arrow by Kelly had one of the best spine charts for wod arrows ever devised. Shawn

[Shawn Leonard]

Just did a little research, computers allow you to be super fast and if you draw 28"s and shoot a 29" woodie, than 75-80# spine with that 145 should shoot about perfect out of your new bow. Shawn

[JamesKerr]

Sorry misread your post and thought it said 45 60 arrows which would indicate a carbon shaft. My apologies.