Author Topic: adding fps (Read 6010 times)

huntnfmly · « **on:** June 07, 2009, 06:46:03 AM »

How many fps on average can you gain shooting the same arrow at 60# then turning your bow up to 70#
thanks

Jason · « **Reply #1 on:** June 07, 2009, 08:29:44 AM »

you might gain 20-30fps, but make sure the arrows are properly spined for 70lbs.

xXx Archery · « **Reply #2 on:** June 07, 2009, 10:18:10 AM »

If the arrow weight stay's the same you will gain or lose 1.5fps per. lb.
but if you drop arrow weight with lbs they stay the same you might lose 1-2fps.
so if you shoot a 70lbs 420grain arrow at 280fps
and then you shoot 60lbs 360grain arrow it will be 278-280fps.

huntnfmly · « **Reply #3 on:** June 07, 2009, 10:30:02 AM »

did i miss read?I can lose 1.5fps if the weight stays the same?

xXx Archery · « **Reply #4 on:** June 07, 2009, 11:28:43 AM »

Ok sorry
lets say you shot 70lbs with a 420grain arrow
it will shoot 280fps
and now you shoot 60lbs..THE ARROW WEIGHT STAYS THE SAME...420grain
you will lose sorry its just 0ver 2 fps per less lb....so you are shooting 10lbs less you will lose about 22fps
if you drop 5lbs you will lose 10-11fps

huntnfmly · « **Reply #5 on:** June 07, 2009, 12:26:31 PM »

so going the other way from 60# to 70# shooting the same arrow i should gain about 22fps.I am a newbie to archery so thank you for the info.

xXx Archery · « **Reply #6 on:** June 07, 2009, 12:52:25 PM »

yes...what arrow are you shooting? 340 or 400. and what lenght of arrow and tip 100 or 125? I will see if it is still spined for yorur bow at 70lbs....Why are you uping the lbs to the bow?

addicted · « **Reply #7 on:** June 07, 2009, 01:00:42 PM »

you could always get longer arms. a longer draw would give you something like 11fps per inch.

xXx Archery · « **Reply #8 on:** June 07, 2009, 01:19:20 PM »

thats harder than adding lbs...

jrebel · « **Reply #9 on:** June 07, 2009, 01:26:32 PM »

Now this is with two different bows, both mathews (dxt vs switchback). Obviously the dxt is newer and has better technology, but I only dropped 6 fps when i went from a 70lb bow to a 60lb bow. If you want to maintain speed and draw less you should look at the dxt, reeson, or monster. I shoot a 60lb dxt with a 444gr arrow at 260 fps. That equates to approx 67 ft/lbs of energy.

huntnfmly · « **Reply #10 on:** June 07, 2009, 01:39:53 PM »

My arrows are 29in. 100grain tips carbon express maxima 350.I believe the spine is 340 idont know why they call them 350.Total arrow wieght 409.I am upping the poundage because last time i had it chronoed it was only shooting 244fps and i am going to add tubing to my peep sight cause there is always a strand in the way.The kenetic energy is just over 54# and i would like more if i can to get pass thrus on elk.I know i dont need to get pass thrus to take an elk but 2 holes is better than 1

huntnfmly · « **Reply #11 on:** June 07, 2009, 01:49:47 PM »

I may not need more than that.I dont know for sure.

xXx Archery · « **Reply #12 on:** June 07, 2009, 02:07:20 PM »

not to be picky but not all that true ...when you back off your bow the limbs come out and the draw lenght is now longer if your draw is now 1/2" longer you gain 5-6 fps. 1/4" you gain 3-4fps Cams do not perform better than other cams at different lbs. Now some cams will perform better than others at different draw lenghts ,most cams lose 10-12 per 1" of draw lenght and then some will only lose 8-10 and just like others 12-14
yes there are a lot of good bows out now that we dont' have to pull alot of lbs to get good speeds
with bow like the monster, 82nd and the X-force
with a X-Force at 28" draw 60lbs with your 444grain arrow it will do 273fps with 74ft/lbs of energy
but you can drop your arrow weight to 400grains and shoot 287fps with 73.5 ft/lbs of engery
now I would rather shoot 60lbs at 287 with a 400grain arrow. the same thing with the Monster

xXx Archery · « **Reply #13 on:** June 07, 2009, 02:15:57 PM »

at 29" and 350 that arrow will be good with that arrow you can only go to 68lbs you have to be 6 grain per lbs
so 6x68=408 you arrow weight. adding tubing to your peep will slow you down 2-4
I shot about that same set up in Idaho 3 years ago and killed a 6pt bull with it no pass thru but the bull went down 80-100 yards its still about shot placement.

huntnfmly · « **Reply #14 on:** June 07, 2009, 02:26:18 PM »

Thanks for the info.

huntnfmly · « **Reply #15 on:** June 07, 2009, 02:29:54 PM »

I am trying to wear out my block 4x4 target cuz i know you still need to put it where it needs to go

jrebel · « **Reply #16 on:** June 07, 2009, 02:30:31 PM »

Absolutely agree with xxx, shot placement is the most critical factor. I have killed elk with a lot less that what I am shooting now. I like a heavy arrow over a fast arrow. Think of it this way. A baseball thrown at 50 mph will do more damage to a batters head than a ping pong ball thrown at 100 mph. expecially when you start looking at longer range shots??? Just my

xXx Archery · « **Reply #17 on:** June 07, 2009, 02:41:11 PM »

thats true jrebel but thats like a 150 grain arrow vs 600 grain arrow as you see in my post I could add 14fps and only lose .5 ft/lbs of engery..at some point it goes the wrong way I feel if you keep your arrow to 375 to 450 grains is good for hunting at the right lbs .and yes it better to be on the heavy side.
Its good to see guys asking ?'s like this.

jrebel · « **Reply #18 on:** June 07, 2009, 02:44:32 PM »

Again I absolutely agree with you. Just trying to put the answer in non technical terms so new archers can relate. A 2000 lb boulder will do you no good if you cant lift and throw it.....

huntnfmly · « **Reply #19 on:** June 07, 2009, 03:11:33 PM »

I am glad i will only loose 2-4 fps with the tubing because my peep i have now is making me crazy.Once again thanks for the info.I am looking forward to using it this season.

xXx Archery · « **Reply #20 on:** June 07, 2009, 03:23:45 PM »

good luck this year and take lots of PICS

Matt · « **Reply #21 on:** June 08, 2009, 03:58:42 PM »

But xXx, isn't the results x2 the loss if shooting a PSE and only 1/2 if shooting a Bowtech?

xXx Archery · « **Reply #22 on:** June 08, 2009, 08:56:49 PM »

Yes Matt I was trying not to get techy about it but PSE makes up for it with no hand torque....

Matt · « **Reply #23 on:** June 09, 2009, 08:10:30 AM »

only if you are shooting in the present.

huntnfmly · « **Reply #24 on:** June 25, 2009, 06:30:49 PM »

I found a new way I went and put money down on a new bow.A little more expensive.but i really liked the martin bengal

Todd_ID · « **Reply #25 on:** June 25, 2009, 07:50:39 PM »

Good Lord, he's already hooked!

huntnfmly · « **Reply #26 on:** June 26, 2009, 05:18:32 PM »

I am normally a rifle hunter but the last few yrs have been spent with my girls hunting rifle so i thought i would try bow hunting this comming yr and yes i am hooked bad and i have not even shot at a animal with it yet

golden bb · « **Reply #27 on:** June 26, 2009, 05:25:38 PM »

I alternate year to year enjoy both.

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Author Topic: adding fps (Read 6010 times)

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