markyj987 Posted August 21, 2005 Report Share Posted August 21, 2005 I've been shooting pretty well lately, so I got some new arrows and did some testing. I'm shooting a 2003 Fred Bear TRX 27.5" draw Gold Tip Pro Hunter 5575 arrows w.100 gr field points (total weight=380 gr.) At a draw weight of 63 lbs, I was getting an average speed of 242.5 fps. Kinetic energy of 49.63 ft. lbs. After cranking up the weight to 66 lbs, I saw an increase in average speed to 247.5 fps. Kinetic energy of 51.7 ft. lbs. Can anyone give me an idea of where my setup stands? I know I have a short draw length and can't really do anything about it. Is there anything I can do to give me a little bit more speed other than growing longer arms? Eventually, I'll probably be able to shoot it at it's max (70 lbs) but seeing that I only gained 5.5 fps, I don't think this will make much of a difference--also, I don't know if on a cold, damp day if I'd be able to do it...LOL. Or should I just be happy I'm shooting well and not worry about it? Quote Link to comment Share on other sites More sharing options...
PAbowhunter4life Posted August 21, 2005 Report Share Posted August 21, 2005 Re: Arrow speed/kinetic energy The KE you have is plenty to kill a deer provided you hit them in the rgiht spot with a super sharp fixed blade head. I wouldn't recommend a mechanical head unless it was a Rocky Mt. Snyper or a G5 Tekan II since these heads have a cut on contact point and require almost zero energy to open. As for speed, you could actually shoot a 330 grain arrow and still be right at the recommended 5 grain per pound minimum of arrow weight. That will gain you a nice chunk right there., but remember, sometimes faster arrows that weigh less can actually drop your KE, so try to find a happy medium. Check out the KE & Ballistics calculator on this link and try to find that happy place: http://home.att.net/~sajackson/archery.html What all do you have on your string? Too much junk on the string can slow you down too. Give me a list of what's on there and I can help ya out. Quote Link to comment Share on other sites More sharing options...
PAbowhunter4life Posted August 21, 2005 Report Share Posted August 21, 2005 Re: Arrow speed/kinetic energy Case in point, I got chronied yesterday at 266 fps with my set up and I too am tinkering to gain a few more fps, but I have decided not to do it witht he arrow weight because after doing some testing I found out : Dropping 20 grains of arrow weight adds 4 fps, but robs me of 2 lb. of KE On the other end , adding 20 grains will slow me down 4 fps, but at the same time I gain 1 lb. of KE Right now I am at 64 lb. of KE so I don't have the same issues as you, I just wanted to point out what I meant by experimenting and finding that happy medium of arrow weight and speed. Quote Link to comment Share on other sites More sharing options...
dg Posted August 23, 2005 Report Share Posted August 23, 2005 Re: Arrow speed/kinetic energy [ QUOTE ] Or should I just be happy I'm shooting well and not worry about it? [/ QUOTE ] You got it.................... Quote Link to comment Share on other sites More sharing options...
willfish03 Posted August 23, 2005 Report Share Posted August 23, 2005 Re: Arrow speed/kinetic energy how do you find out what your kinetic energy is. right now shooting 295 grain arrow at 329fts with 58lbs pull . Quote Link to comment Share on other sites More sharing options...
dogdoc Posted August 23, 2005 Report Share Posted August 23, 2005 Re: Arrow speed/kinetic energy http://www.goldtip.com/calculators/kinetic.asp markey---switch to feathers and an 85 grain head and you will increase your speed. However--a heavier arrow is a little more forgiving and quiets the bow down. With a KP of 50 you can shoot just about anything you want here in the good ole' USA. todd Quote Link to comment Share on other sites More sharing options...
willfish03 Posted August 23, 2005 Report Share Posted August 23, 2005 Re: Arrow speed/kinetic energy thanks for the calculator 70.92lbs Quote Link to comment Share on other sites More sharing options...
dogdoc Posted August 23, 2005 Report Share Posted August 23, 2005 Re: Arrow speed/kinetic energy [ QUOTE ] how do you find out what your kinetic energy is. right now shooting 295 grain arrow at 329fts with 58lbs pull . [/ QUOTE ] dude---what kind of bow are you shooting? 329fps with only a 58# pull??? I know you are shooting a very light arrow but dang that's fast---the only bow I've seen shoot that fast was a High County using a very light arrow and a 55 grain head. I think HC is the only bow manufacturer that recommends an arrow that light. todd Quote Link to comment Share on other sites More sharing options...
struttinhoyt Posted August 23, 2005 Report Share Posted August 23, 2005 Re: Arrow speed/kinetic energy an arrow that light would be pretty much like dry firing that thang.... Quote Link to comment Share on other sites More sharing options...
VtBowhunter Posted August 23, 2005 Report Share Posted August 23, 2005 Re: Arrow speed/kinetic energy Sounds like a dangerous setup there to me.......willfish, I hope you keep a very good eye on your arrows and bow after your shots......that thing sounds like it could blow. Quote Link to comment Share on other sites More sharing options...
PAbowhunter4life Posted August 23, 2005 Report Share Posted August 23, 2005 Re: Arrow speed/kinetic energy [ QUOTE ] how do you find out what your kinetic energy is. right now shooting 295 grain arrow at 329fts with 58lbs pull . [/ QUOTE ] 329 fps with a 295 grain arrow and only pulling 58 lb. of draw weight????? Just for kicks though, what is your draw length? Quote Link to comment Share on other sites More sharing options...
PAbowhunter4life Posted August 23, 2005 Report Share Posted August 23, 2005 Re: Arrow speed/kinetic energy ttt Quote Link to comment Share on other sites More sharing options...
AaronS Posted August 23, 2005 Report Share Posted August 23, 2005 Re: Arrow speed/kinetic energy Cool calculaters guys. If I'm right on my arrow weight it puts me a shade over 63 # of KE. Quote Link to comment Share on other sites More sharing options...
PAbowhunter4life Posted August 23, 2005 Report Share Posted August 23, 2005 Re: Arrow speed/kinetic energy I am shooting 64# myself and believe me, deer, elk, bear, moose, whatever you want to shoot will come to it's death from an arrow leaving your bow. However, I am working out a method to get some added speed without reducing arrow weight, and I've already gained a little bit, so my KE is going higher as I type lol Quote Link to comment Share on other sites More sharing options...
BowJoe Posted August 30, 2005 Report Share Posted August 30, 2005 Re: Arrow speed/kinetic energy With all of these fancy calculations and debates over a few adjustments, it makes you wonder how the Natives ever killed a buffalo.LOL As long as the arrow flies true, straight, and has a sharp tip, it will penetrate. Quote Link to comment Share on other sites More sharing options...
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