FPS and Draw Lenth

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02-01-2003, 03:34 PM

midwestxpress

Fork Horn

Thread Starter

Join Date: Feb 2003

Location: jackson new jersey

Posts: 301

FPS and Draw Lenth

On average how many FPS do you loose per inch of draw.The BowTech BlackKnight short, with a 350gr. arrow, 29in.draw and 70lb. draw comes with 342-350 fps. What would it come down to with a 27in. draw?

02-01-2003, 04:29 PM

bigcountry25

Fork Horn

Join Date: Feb 2003

Location:

Posts: 361

RE: FPS and Draw Lenth

Problaly in the range of 322-330. You lose around 10fps for each inch. The BK2 tall brace has a 30" draw at 70lbs doing 342-350.

02-01-2003, 08:12 PM

JeffB

Nontypical Buck

Join Date: Feb 2003

Location: CT, USA

Posts: 3,058

RE: FPS and Draw Lenth

I have found that for a good average most bows lose or pickup roughly 3-4% in FPS per inch of altered draw length.

So if a bow was shooting 300 FPS and you went up an inch it would increase by about 9-12 FPS.

In your case it would be a loss of about (assuming 350 FPS @29 &quot

18-24 or so FPS.

02-01-2003, 08:49 PM

selway

Join Date: Feb 2003

Location: wi USA

Posts: 233

RE: FPS and Draw Lenth

another ? what would going down in poundage do to speed. like going from 70# to 60# to 50#

you can use your pepper spray my 12 gauge with 3 inch slugs works fine