An offer to help

[Todd_ID]

Todd, thanks.  Could you run this with her bow at 55 pounds?  We figured they might be a bit stiff at 45 pounds.  She is working on increasing it as she can.

At 55 lbs, it looks like it needs a .604 spine, so it's still too stiff, but getting better.  The numbers at 55# are: 232fps, 14.59% FOC, 41.5 ft-lbs KE, 346 grain arrow.  Again, if you have problems getting it to shoot well, then arrow spine is most likely the place to start.

Arrow drop 20-50, KE @ 50
45.7", 35.6 ft-lbs

[nitro]

Todd like to see some numbers for my new bow. hoyt maxxis 31 70lbs 27 inch draw easton 340 axis, muzzy 3 blade oh ya 4 blazer vanes.

[GoldTip]

Todd, thanks for doing this for everyone, would appreciate what you can tell me for info.  Have not chrono'd my bow but it shoots well.


2008 Bowtech Guardian at 29.5 draw length, set at 72lbs
Goldtip 7595's cut at 29.5", 3 blazer vanes
Sonic 125gr coc broadheads.
Trophy Taker drop away.

Thanks in advance for the info, cool program you have.

[Todd_ID]

Todd, thanks for doing this for everyone, would appreciate what you can tell me for info.  Have not chrono'd my bow but it shoots well.


2008 Bowtech Guardian at 29.5 draw length, set at 72lbs
Goldtip 7595's cut at 29.5", 3 blazer vanes
Sonic 125gr coc broadheads.
Trophy Taker drop away.

Thanks in advance for the info, cool program you have.

It's been fun seeing the different setups and how they perform.  What I found for you: Recommended Spine .312 (yours are .340), they're a little weak, but not terrible.  293 fps, 14.1% FOC, 82 ft-lbs KE, 428 gr arrow weight.  Seeing the high FOC, I'm not surprised to hear that you're able to shoot the marginally weak spine with good results.  Switch broadheads to one with less desirable flight characteristics, and you'd probably need to drop to 100 grain heads to get it to fly well.  The numbers for 100 grain heads: recommended spine .322, 299 fps, 11.9%, 80 ft-lbs, 403 grains.

Arrow Drop 20-50, KE at 50
125 gr: 26.5", 69.2 ft-lbs
100 gr: 25.3", 67.4 ft-lbs

I say stick with what you've got unless you just can't quit buying equipment (like me). 

[Todd_ID]

Todd like to see some numbers for my new bow. hoyt maxxis 31 70lbs 27 inch draw easton 340 axis, muzzy 3 blade oh ya 4 blazer vanes.

I had to make an assumption of 27" arrows and head weight, so I'll show it with both 100 and 125 grain heads on 27" arrows. 
100 grain: Recommended spine is .367, so that's fine at your .340. 278 fps, 12.46% FOC, 68 ft-lbs KE, 396.5 gr arrow weight.
125 grain: recommended spine is .355, so that's better using the slightly stiffer .340's.  273 fps, 14.67%, 69.7 ft-lbs, 421.5 gr.

Arrow Drop 20-50, KE at 50
100 gr: 30", 58.4 ft-lbs
125 gr: 31.4", 59.8

[luvtohnt]

It sounds like you have a way cool program

2006 Martin Tracer-71#, 28" draw
Easton ST epic 340 cut to 29" with 4" vanes
125 gr. Montec G5 broadheads.
Whisker Bisquit rest

Thanks for running the numbers for me.

Brandon

[GoldTip]

Todd, thanks for doing this for everyone, would appreciate what you can tell me for info.  Have not chrono'd my bow but it shoots well.


2008 Bowtech Guardian at 29.5 draw length, set at 72lbs
Goldtip 7595's cut at 29.5", 3 blazer vanes
Sonic 125gr coc broadheads.
Trophy Taker drop away.

Thanks in advance for the info, cool program you have.

It's been fun seeing the different setups and how they perform.  What I found for you: Recommended Spine .312 (yours are .340), they're a little weak, but not terrible.  293 fps, 14.1% FOC, 82 ft-lbs KE, 428 gr arrow weight.  Seeing the high FOC, I'm not surprised to hear that you're able to shoot the marginally weak spine with good results.  Switch broadheads to one with less desirable flight characteristics, and you'd probably need to drop to 100 grain heads to get it to fly well.  The numbers for 100 grain heads: recommended spine .322, 299 fps, 11.9%, 80 ft-lbs, 403 grains.

Arrow Drop 20-50, KE at 50
125 gr: 26.5", 69.2 ft-lbs
100 gr: 25.3", 67.4 ft-lbs

I say stick with what you've got unless you just can't quit buying equipment (like me). 

Todd, thanks a lot for the info. To be honest have been pretty darned happy with the setup thus far.  Had contemplated changing to Shuttle T broadheads, but to be honest after seeing the poor results on animals with good hits that my cousin got this year, I'll be sticking with my Sonics.

[bonkellekter]

Quick question: I downloaded the trial version of this program and I have to enter alot of the equipment (mainly bows) manually. There is only like 10-12 options in the trial version. Do you get a better selection once purchased.

thanks

[Todd_ID]

Quick question: I downloaded the trial version of this program and I have to enter alot of the equipment (mainly bows) manually. There is only like 10-12 options in the trial version. Do you get a better selection once purchased.

thanks

Yeah, the trial version only has a few selections, but the rest come when you buy it and do the database update.

[GoldTip]

OK one more if you don't mind for my buddies bow.

Diamond Marquis, 29" draw set at 64lbs, 80% letoff
5575 Goldtip XT Hunters at 29.5"
3 blazer vanes
125gr Sonics.

[Todd_ID]

It sounds like you have a way cool program

2006 Martin Tracer-71#, 28" draw
Easton ST epic 340 cut to 29" with 4" vanes
125 gr. Montec G5 broadheads.
Whisker Bisquit rest

Thanks for running the numbers for me.

Brandon

Couldn't find a Tracer in the lists until 2004.  IBO speed was listed as 305, so it probably didn't change much if it is a 2006 model.  Says it needs a .371 spine, so you're good with the .340, just a little stiff.  The numbers for your setup: 258 fps, 11.75% FOC, 68.57 ft-lbs, 463.8 grain arrow weight

Arrow Drop 20-50, KE at 50
37.5" 54.2 ft-lbs

Don't see anything wrong in any of that!

[Todd_ID]

OK one more if you don't mind for my buddies bow.

Diamond Marquis, 29" draw set at 64lbs, 80% letoff
5575 Goldtip XT Hunters at 29.5"
3 blazer vanes
125gr Sonics.

Didn't see a year on there, but they only made it in 08 and 09.  Neither year had an 80% let-off, so I used their max of 75.  If it is 80, then it only makes a 1-4 fps difference.  The 5575 (at .400 spine) are a bit too weak since it calls for a .356 spine arrow.  A 100 grain broadhead helped, but not enough to warrant a change. However, the 7595's at .340 might solve any problems you guys find.  I'll show the numbers for both: 5575 and 125 grains: 278 fps, 14.8% FOC, 70 ft-lbs KE, 407.3 grain arrows.  7595 and 125 grains: 271 fps, 12.42%, 72 ft-bls, 440 gr.

Arrow Drop 20-50, KE at 50
5575: 30.2", 59.2 ft-lbs
7595: 32.0", 61 ft-lbs

[uplandhunter870]

would you mind running some numbers for me please?  mainly interested in best spine, need to buy arrows but im thinking im a tad underspined

2008 reflex bighorn, 27" draw, 70#, beman ics hunters 340s @9.3gpi 28.5" long, 100gr. field points, 100gr. 3 blade wasp boss bullets.  3 quick spin ST speed hunter 2in w/ bohning wraps, shooting out of a D-loop and a drow away.

thanks Steve

[Todd_ID]

would you mind running some numbers for me please?  mainly interested in best spine, need to buy arrows but im thinking im a tad underspined

2008 reflex bighorn, 27" draw, 70#, beman ics hunters 340s @9.3gpi 28.5" long, 100gr. field points, 100gr. 3 blade wasp boss bullets.  3 quick spin ST speed hunter 2in w/ bohning wraps, shooting out of a D-loop and a drow away.

thanks Steve

No problem....With your setup it shows the recommended spine to be .407, so the 340's are off the charts stiff, even with 125 grain heads.  Stick with what you've got unless you want to change something, and then maybe think about the .400 spine arrows.  The numbers now: 254 fps, 10.46% FOC, 61 ft-lbs KE, 426 grain arrow weight.  Go to 400's and 100 grain heads and it becomes: 259 fps, 11.1%, 59.7 ft-lbs, 400.4 grains.  Again, stick with what you've got unless you're having flight problems during/after tuning.

Arrow Drop 20-50, KE at 50
340's and 100 gr: 37.6", 51.6 ft-lbs
400's and 100 gr: 35.7", 50.6

[uplandhunter870]

Thank you very much!