New Setup - Need Opinions

[MikeTCU]

Took my RPM 360 to CCR yesterday. Those guys took great care of me, just wanted to get thoughts on the numbers. Should I go with slightly lighter arrow for more speed or stay with a slower wrecking ball? Current specs below...

73lb
29 inch draw
598g FMJ 300 Dangerous Game

Chrono'd at 267, 269 and 265
93lb KE
.703 on momentum
9.5% FOC (should this number be higher?)

[muddyfuzzy]

New Setup - Need Opinions

Your speeds are still very respectable despite and arrow pushing 600 grains mass weight. Your FOC is also average for your set up. You are shooting a heavy GPI shaft, that coupled with a longer overall arrow length will drive the number down every time. You have a ton of options but your current set up is pretty solid IMO, changing is really up to you and what you prefer in terms of speed vs terminal performance.


Home of High and EFOC arrows

[txdukklr]

93lbs of KE

sledgehammer. If it shoots well and you can get good groups that particular number has far more meaning to me than any of the others.

[muddyfuzzy]

93lbs of KE

sledgehammer. If it shoots well and you can get good groups that particular number has far more meaning to me than any of the others.

It shouldn't, momentum is king bro.......no matter how you slice it.


Home of High and EFOC arrows

[Bigdaddy]

I'm getting 94 KE out of my Bowtech Boss 32 inch draw 418 grain arrow. Agreed the guys at CCR are good guys!!

[MikeTCU]

Awesome input, thanks guys.

[txdukklr]

It shouldn't, momentum is king bro.......no matter how you slice it.


Home of High and EFOC arrows

cool . . . . explain why?

[muddyfuzzy]

In the formula for ke we square velocity, so it's really heavily weighted in that department. When you look at the momentum calculation we look at velocity and mass weight in a more equally proportional manner. A quicker setup will really drive up the ke number and make it look more appealing than the set up truly is. Momentum; however, is directly proportional to penetration potential as the arrow resists stoppage as a direct result. This is why mass weight no longer takes a backseat to velocity in the calculation.


Home of High and EFOC arrows

[dustoffer]

I'm a heavy arrow fanatic--I wouldn't change a thing if it shoots good for you.

[txdukklr]

In the formula for ke we square velocity, so it's really heavily weighted in that department. When you look at the momentum calculation we look at velocity and mass weight in a more equally proportional manner. A quicker setup will really drive up the ke number and make it look more appealing than the set up truly is. Momentum; however, is directly proportional to penetration potential as the arrow resists stoppage as a direct result. This is why mass weight no longer takes a backseat to velocity in the calculation.


Home of High and EFOC arrows

what is the calculation for momentum?

[muddyfuzzy]

what is the calculation for momentum?

Mo=m•v/225400



Home of High and EFOC arrows

[JW]

It shouldn't, momentum is king bro.......no matter how you slice it.


Home of High and EFOC arrows

Yep. KE is as useless as wet toilet paper.

Took my RPM 360 to CCR yesterday. Those guys took great care of me, just wanted to get thoughts on the numbers. Should I go with slightly lighter arrow for more speed or stay with a slower wrecking ball? Current specs below...



73lb

29 inch draw

598g FMJ 300 Dangerous Game



Chrono'd at 267, 269 and 265

93lb KE

.703 on momentum

9.5% FOC (should this number be higher?)

If you ever changed I would go with a lighter gpi shaft and make up the weight in your insert and Broadhead to raise the Foc. But if it's shooting good now roll with it.

[MikeTCU]

Yep. KE is as useless as wet toilet paper.





If you ever changed I would go with a lighter gpi shaft and make up the weight in your insert and Broadhead to raise the Foc. But if it's shooting good now roll with it.

Dumb question, does greater FOC lead to greater penetration? If momentum and KE dont change but you have greater FOC, is the idea of putting more weight up front lead to harder hitting arrows?

[gmac]

Here is an ongoing discussion on FOC. Over 1100 posts, ton of knowledge here.

http://discussions.texasbowhunter.com/forums/showthread.php?t=491686&highlight=FOC

[JW]

Dumb question, does greater FOC lead to greater penetration? If momentum and KE dont change but you have greater FOC, is the idea of putting more weight up front lead to harder hitting arrows?

Per an extensive study over the course of years conducted by Dr Ed Ashby yes.