Someone run a spine for me please?
 

I need someone with one of those fancy programs to run an arrow spine for me. The question really is, which one of two tips would be a better match for the spine on my bow. Here are the specs:

Bow: Bowtech Tomkat, 61# draw, 28" DL, single cam. Don't know if it matters but it is 32ATA with 8" brace.

Arrow: Easton Epic, factory nock and insert, w/ 3 - 2" blazers. Shaft length is 26.375, or 26.75 to the bottom of the nock.

Heads: I have both 100's and 125's and can shoot either just dependding on which matches the spine the best.

Anyone who can run this for me,I would appreciate it.

RE: Someone run a spine for me please?
 

Assuming you are using 400 shafts and a d-loop,the 125's will be slightly better but not enough that I would worry with.

If not using a d-loop,I would advise sticking with the 100's.

Since you have both,I would try both and see which works best.

RE: Someone run a spine for me please?
 

Thanks for running it for me TFOX. However though, I got impatient and downloaded the trail version, and ran it myself. I still have questions though, because I am really new to this aspect of shooting. I gave you some bum information, and not sure how much it affects things, ATA is 32.5, not 32, and Brace is 8.5, not 8.

When I ran the numbers it was showing that my spine was pretty heavy, like a .4292, when I needed a 400 or something like that. To get it where it was saying no change necessary I was having to bring tip weight all the way up to 175. Now I do have some muzzy 50 grain brass inserts, but the shop that cut my arrows superglued in the factory inserts. I know I can get them out using heat and acetone, (being VERY careful) but is it worth risking the damage to the shaftsto do so? I don't mind the trajectory changing and going with a high FOC setup in the least, but don't know if jumping through the hoops is worth it.

It seems to be shooting okay as is, but I am kind of a perfectionist. What are your thoughts on it?

RE: Someone run a spine for me please?
 

I prefer Archers Advantage and it looks like you are using OT2,I also have that program but I don't care for it.


My program shows you stiff with the 400's but well within acceptable spine ranges for hunting.The .429 is a lighter spine,not a heavier spine so the numbers I got and you got are very close.

The brace and a-a won't affect anything.

RE: Someone run a spine for me please?
 

Okay, thanks TFOX. I will stick with what I've got then. I have it partially tuned for them anyways. I have done bareshaft and walkback, it is time to start broadhead tuning now.

RE: Someone run a spine for me please?
 

In OT2 if you do not check the Hunting box in the spine match tab then most huntingarrows will show too stiff.

RE: Someone run a spine for me please?
 

Ahhh.... Okay Bruce, I will try that also. I'm sure I didn't click that. I saw it but didn't worry about it. I did click 4 blade broadhead though.

I went ahead and put those 50 grain Muzzy inserts into my CX Eliminator shafts last night. With a 100 grain broadhead it will get them up to the same total arrow weight as the Epics with a 125 grain head. Both will come out about 410 grains on a 27 inch shaft.