View Full Version : estimated FPS...
March 7th, 2005, 05:26 PM
i cant get to my shop soon (dont even know if they have a chronograph) but i was wondering what my approximate FPS would be?? im shooting a Browning Micro Adrenaline XS. the IBO at 28" and 50lbs with a 250g arrow is shoots 280. im currently at 24" #40. also could you give me a guess at the FPS would be at #45 and #50 at 24" would be?? thanks for your help in advance.
March 7th, 2005, 08:37 PM
oh, im currently shooting 200g arrows and 85g tips...
March 7th, 2005, 09:01 PM
welcome to the forum ........
heres a general rule of thumb to run by on fps
if your going off the IBO speed ....for every inch of draw you gain of lose from IBO either ad or subtract around 10 f.p.s(ex , if the ibo was tested @28'' and yours is only a 24'' then subtract about 40 fps off ibo) ..............for every 5 grains of arrow weight you add or subtract from off the original tested arrow weight add or subtract 1 fps (ex, if your shooting a 260 gr arrow and a 250 gr was tested then every 5 grains subtract 1 fps so you would take of 2 fps .............and finally poundage goes ive found that for every pound of draw weight i add i usually get about 2 fps.......if i go up 5 pounds i usually gain about 10 fps ..........but most of the testing that ive done has been on higher poundage bow .....i would believe that the adreneline xs would have very similar results ......different bows will yeild different results so what i show is kind of the average
March 7th, 2005, 10:07 PM
that gives me about 24 KE, what can i decrease or increase to gain a lil more KE??
March 8th, 2005, 08:40 PM
March 8th, 2005, 09:34 PM
To The Top^^^
sorry this is the only help i can give..my wife shoots same setup but i dont know her speed either...if i had to guess i would say about 170-180...same advise i give my wife=dont shoot past 30 yds--shot placement is the key.
March 8th, 2005, 10:23 PM
I would take an educated guess and say about 230pfs, IF you have nothing on the string. Brass nocksets -4fps/each. Kisser button -4fps, peep with tube aligner -10fps. String silencers -8fps.
Probably closer to 200 to 210fps.
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