help whats my fps
03-07-2005, 07:40 PM
#1
Thread Starter
Join Date: Oct 2004
Location: northern Minnesota
Posts: 110
help whats my fps
I got 2219 arrows 26 inches
4 inch plastic vanes
125 field head.
all i got on the string is a kisser weighs 7 grains and two brass nocks
i dont have chrono available what would my speed be? I have tried sights and cant figure them out? thanks guys
4 inch plastic vanes
125 field head.
all i got on the string is a kisser weighs 7 grains and two brass nocks
i dont have chrono available what would my speed be? I have tried sights and cant figure them out? thanks guys
03-07-2005, 07:53 PM
#2
Giant Nontypical
Join Date: Feb 2003
Location: Dover, PA USA
Posts: 5,497
RE: help whats my fps
With your specs, string load and arrow weight don't expect any big speed numbers.....
At 360grs (Which is 5grs per lb of draw weight) your set up is probably doing,at best, around 280fps (-30fps for 27" draw and another 6-8fps for the kisser and brass nocks from your 318fps IBO rating)
Now your 2219's with a 125 gr head and 4" vanes probably weight about 560grs which is pretty darn heavy.[:-]
at 72# you are basically 200grs over that IBO 5grs /lb of draw weight standard.......This is probably dropping your speed another 75-80fps?
Realistically don't expect much more than around 200fps from your set-up.
My suggestion would be to lighten up the arrow weight to a more moderate level.....low to mid 400gr range and it will bring your speed and trajectory way up and still retain plenty of KE. You could probably raise your speed 50fps or so by dropping down to a 425gr arrow (-135grs)
At 360grs (Which is 5grs per lb of draw weight) your set up is probably doing,at best, around 280fps (-30fps for 27" draw and another 6-8fps for the kisser and brass nocks from your 318fps IBO rating)
Now your 2219's with a 125 gr head and 4" vanes probably weight about 560grs which is pretty darn heavy.[:-]
at 72# you are basically 200grs over that IBO 5grs /lb of draw weight standard.......This is probably dropping your speed another 75-80fps?
Realistically don't expect much more than around 200fps from your set-up.
My suggestion would be to lighten up the arrow weight to a more moderate level.....low to mid 400gr range and it will bring your speed and trajectory way up and still retain plenty of KE. You could probably raise your speed 50fps or so by dropping down to a 425gr arrow (-135grs)
03-07-2005, 09:03 PM
#4
Senior Member
Join Date: Feb 2003
Location: Indiana PA USA
Posts: 3,656
RE: help whats my fps
gruhotbigracks,
I would say that your bow is probablly shooting in the 205-210 f.p.s. range. Matt was right on with his estimations! Those really heavy arrows and the shorter draw length really take the speed down.
If you were to switch to a 450 grain arrow, you would probablly be shooting around the 240-245 f.p.s. range and would really flatten out your trajectory!
I would say that your bow is probablly shooting in the 205-210 f.p.s. range. Matt was right on with his estimations! Those really heavy arrows and the shorter draw length really take the speed down.
If you were to switch to a 450 grain arrow, you would probablly be shooting around the 240-245 f.p.s. range and would really flatten out your trajectory!
03-07-2005, 09:06 PM
#5
Giant Nontypical
Join Date: Feb 2003
Location: Dover, PA USA
Posts: 5,497
RE: help whats my fps
No problem.......my suggestion on an aluminum shaft for your set-up would be probably a 2215 @ 26" w/ 4" feathers rather than vanes, and 100gr broadhead.
That will give you a finished arrow weight of about 435grs, a nice FOC between 10-11% and will pick you up about 50 fps which should get you around 250fps +/-
A 2216 w/ a 100gr head and 4" vanes is going to give you a pretty low FOC measurement.....probably at or below 8%.
That will give you a finished arrow weight of about 435grs, a nice FOC between 10-11% and will pick you up about 50 fps which should get you around 250fps +/-
A 2216 w/ a 100gr head and 4" vanes is going to give you a pretty low FOC measurement.....probably at or below 8%.
