Pro hunting shows and expanding broad heads...

[SA Friday]

Yep, I get the crossbows using mechanicals. Some of the higher end ones are pushing velocities that would cause some planing even tuned. The compound bows? Na, spin tune them and paper tune the bow. They'll shoot like lasers.

Runninlope, If you are getting the Muzzies spin-tuned, there is something slightly off on the bow tuning. I would have to see the bow and see it while shooting to try and figure it out. Paper tuning the bow will really point out issues with the bow tuning.

[hunterhawk]

I have shot a lot of deer with mechanicals.. I love them! Huge holes which equals amazing blood trails. I shoot spitfires and I have killed deer at pretty long ranges.. If they are killing deer why change! I also have had pass throughs through all but one and that's because I hit the opposite side shoulder.. As long as you put a good hit on them it shouldn't matter if its a fix blade or mechanical

[TRnCO]

As long as you put a good hit on them it shouldn't matter if its a fix blade or mechanical

you should add, "and as long as you have adequate KE", which is why so many fail to get complete pass throughs.
Personnaly, I prefer two holes, one in and one out, every time. Nothing but COC for me on everything except turkeys.

[runninlope]

Im not a real fan about people throwing out the whole Kenetic Energy bs. If you are shooting any compound bow made within saw the last 15 years and shooting more than 40 pounds you can punch a mechanical through one side and either into the other or punture through the other. Kenetic energy is most influenced by speed. so if you shooting 40# or a long bow no dont shoot mechanicals. But idk if these people shooting mechanical are shooting quartering to shots or what by my 2 blade mechanicals will punch through anything atleast once. Also, having a exit hole does nothin to get a quicker kill as all that matters and whats going on in the rib cage. I know my 2 inch hole i put through the first side and through the lungs will knock anything down quick. My bow in a diamond i think 5 or 6 years old pumps more than enough "KE" into an arrow with a mechanical. sorry for the rant lol just my OPINION

[SA Friday]

Im not a real fan about people throwing out the whole Kenetic Energy bs. If you are shooting any compound bow made within saw the last 15 years and shooting more than 40 pounds you can punch a mechanical through one side and either into the other or punture through the other. Kenetic energy is most influenced by speed. so if you shooting 40# or a long bow no dont shoot mechanicals. But idk if these people shooting mechanical are shooting quartering to shots or what by my 2 blade mechanicals will punch through anything atleast once. Also, having a exit hole does nothin to get a quicker kill as all that matters and whats going on in the rib cage. I know my 2 inch hole i put through the first side and through the lungs will knock anything down quick. My bow in a diamond i think 5 or 6 years old pumps more than enough "KE" into an arrow with a mechanical. sorry for the rant lol just my OPINION

Sorry, but you cannot re-define the physics of a moving object. KE and momentum are both velocity and mass dependent. If you are losing approximately 30% of your KE and not changing your mass, the loss comes directly out of the velocity. Although this only lowers the KE slightly because the KE's velocity is squared, the velocity for momentum is not. So, the loss IS going to significantly affect the momentum and therefore the ability to penetrate.

An exit hole does do more to kill. It's another blood outlet. Internal bleeding will eventually incapacitate an animal, but it's also restricted by tissue and membranes so the bleeding is slower. Secondly, the exit hole is more blood on the ground. I like tracking with more blood on the ground.

[runninlope]

I know the formula for KE. But mechanicals dand reduce KE by 30 percent. My mechanicals open with virtualy no force. it takes nothing to open them. hell i have shot the muzzy mx-4 into a layered target with rages and rage practices that dont open. i on average get less penetration with the MX-4. The mechanicals maybe lower your KE by 5%. it cant be any more. But what hangs them up is a 2 to 2 3/8 cutting diameter that often catches ribs on the entry where the fixed blades will glance along the ribs. I can only speak for the rage 2 blades i have as i havent shot any other mechanical yet, but as for them, an irrelevant amount of KE is lost due to force opening the blades.

[J]

Sorry, but you cannot re-define the physics of a moving object. KE and momentum are both velocity and mass dependent. If you are losing approximately 30% of your KE and not changing your mass, the loss comes directly out of the velocity. Although this only lowers the KE slightly because the KE's velocity is squared, the velocity for momentum is not. So, the loss IS going to significantly affect the momentum and therefore the ability to penetrate.

I agree with what you are saying, but not your math.

Since F=MA, or KE = MV^2, you get a bigger drop in KE from velocity drop (and assuming similar deceleration, your force) than you do a drop in momentum where p = mv. Simple number examples follow.

KE = 100 * 8 = 6,400, KE = 100 * 6 = 3,600 a ~44% drop in KE.
Whereas p = 100 * 8 = 800, or p = 100 * 6 = 600 a 25% drop in momentum.

[275RLTW]

Expandables see a quicker decrease in KE since some of that enregy upon initial contact is needed to open the blades. Fixed blades retain their KE better and is why there are more pass through shots seen with fixed blades vs expandables. For anything larger than a turkey or a Key deer, I woudn't recommend expandables. As I said before, spend a few minutes for broadhead tuning.

[J]

What amuses me about this thread...

this is an archery forums equivalent to the non stop 9mm vs 45 thread. Always comes up, and always has supporters on each side.

[275RLTW]

Nah...this is more like Hydra shock vs Glazer safety slug. 2 cam vs solo cam would be a better equivilent to 9 vs 45 I think.










BTW...2 cams can be tuned better.