Is this enough?

[Richie Nell]

"So, your saying that if I shoot a 40# bow the arrow would be fine, but if I shoot a 50# bow it'd be ineffective????? Physics kinda passed you by didn't it?"

I totally agree with what you are thinking here.

If there is such a thing as a "10 gpp" rule of thumb it should be as long as you are shooting a 55-60+ lb. bow.

[Orion]

George, you're a gem.  Particularly like your reference to the search button.  Since this question is posted weekly or more frequently, maybe it should be placed at the top of the thread along with Trad Gang Policies, Changing one's Avatar, etc.  On the other hand, folks never seem to tire of beating this horse.

[customcrester]

Original post by robtattoo,Quote...So, your saying that if I shoot a 40# bow the arrow would be fine, but if I shoot a 50# bow it'd be ineffective????? Physics kinda passed you by didn't it?
                                                                                                 Sure it would be effective,but not as much.A 50# bow shooting a 400 grain arrow would put less of the bows energy into the arrow and you would get a little less penatration.The more of the bows energy that goes into the arrow will make the arrow more efficient.Thats why heavy arrows always penatrate better.This is just my opinion from my own experiences and testing.I never said a 400 grain arrow at 165-170 fps would not be ok to kill deer.It's all good!!

[Terry Green]

Originally posted by Prairie Drifter:
Is a 400gr arrow at 165-170fps enough for deer out to 20-25yds from a well tuned set-up?

Those are the specs of the arrow....and it makes no difference what the bow weight its or the draw length that got it there.  The arrow has a speed, and it has no clue about the bow or draw....it is what it is.

Yes, that is enough to kill a deer.  I wish your daughter the best afield.

[robtattoo]

Originally posted by SPLITSHAFT:
So, your saying that if I shoot a 40# bow the arrow would be fine, but if I shoot a 50# bow it'd be ineffective????? Physics kinda passed you by didn't it?
                                                                                                 Sure it would be effective,but not as much.

Erm.....where to start.

Okay, back to basics.

If arrow of a given weight is flying at a given speed, it doesn't make a bit of difference what caused the arrow to get to that speed, be it a 10# bow or a 100# bow.

If however (You now, like in the REAL world) you shoot the exact same weight arrow out of 2 bows of different weights but identical design, it will always, always (seriously, always) travel faster out of the heavier weight bow. More speed equates to more energy. More energy equates to better penetration.

An example; My Morrison Cheyenne is 63# My Wife's Morrison Cheyenne is 34# My bow shoots a 688g arrow ar around 188fps (give or take) Now, how fast do you think Jules's bow shoots the same arrow? 188? Nearer 100fps
Therefore, a heavier bow will be more efficient with an arrow than a lighter bow.
Ergo, a 400gn arrow is a 400gn arrow & yes a 40# bow makes it 10gpp. A 50# bow makes it 8gpp & a hell of a lot faster/more effective.

See, every day's a schoolday!  

[Robert Honaker]

Yes, go hunting.

[Hud]

The only left is to make sure the arrows fly straight, group inside a pie plate at her maximum effective range, whatever that is, and put a good quality 2 blade, or one with a bleeder on the arrow, shaving sharp, and go have fun.

Having said that, some states have a minimum for draw weight, arrow weight or broadhead size, or restrictions on broadheads. Check it out.

[Jim now in Kentucky]

Really funny--ignoring the facts presented in the first post to leap to the traditional arguments. Kind of says something about our culture.

How about if a sharp broadhead goes through both lungs will it kill whitetail?--Not unless it's at least 10 grains per pound from at least a 45 pound bow.  

[Covey]

Man that wore me out!!    Jason

[ChuckC]

Sometimes this is exaspirating, but slow down a minute and help the folks out.  

There seems to be confusion,  so  get it un-confused.  

Normally this question states the bow weight and arrow weight.   But this time, a curveball was added.  Bow weight was not mentioned... and for good reason !   We should all rejoice and take note of that.

From now on... maybe we should make that rule.  No bow weight !  Why ?  Cause sometimes a certain 55#, and a certain 50# and a certain 45# bow may actually launch an arrow,  the same weight arrow... at the same speed.

As was said above.... the arrow don't know what bow pushed it, but it does know (??) how fast it is going.

It really isn't the bow weight we need to know, but rather the arrow speed that it will produce with the arrows you are planning to use.

Speed and weight are what is needed to calculate momentum or kinetic energy, which ever you use or believe in.    

Aside from those calculations it is also used to just "look and figure out" if a given set-up is probably adequate to go thru a deer sized critter.

Did I make it worse ?  

Remember  speed and arrow weight are what's important to know.
ChuckC

[Bjorn]

Your set up is great. Don't forget the pics!

[James on laptop]

Yeah take the camera because if she shoots a deer in the side you will have pictures of two holes and a big smile to take.  

[Gray Buffalo]

Here is one for you. Say I’m shooting a bow ?# and it shoots a 400gr arrow 180 f/s and a 600gr arrow 160 f/s. which is better?

[daveycrockett]

Originally posted by Bjorn:
Your set up is great. Don't forget the pics!

I 2nd that  

[Richie Nell]

Gray,
I think you need a heavier bow.