arrow speed
02-13-2005, 04:14 PM
#1
Thread Starter
Join Date: Oct 2004
Location: northern Minnesota
Posts: 110
arrow speed
Hi i got the following bow
2004 bow tech liberty
28 draw
wisker bisket
70 pounds
tube peep
string loop
string leeches
I shot 550 grain arrows and just got 220 feet per second i just bought 390 total with field point. What should i get now for fps?
2004 bow tech liberty
28 draw
wisker bisket
70 pounds
tube peep
string loop
string leeches
I shot 550 grain arrows and just got 220 feet per second i just bought 390 total with field point. What should i get now for fps?
02-13-2005, 05:19 PM
#3
Join Date: Dec 2003
Location: Florida Panhandle
Posts: 273
RE: arrow speed
I think your arrow weight is incorrect for the first, heavy arrow. A 2004 Liberty is rated around 308 fps IBO, and according to my calc's you would shoot a 550 grain arrow at:
308 IBO
- 66.6 (for 200 grains over IBO)
-15 (for tube + string leeches)
-20 (for 2" under IBO)
= 206 fps
For a 390 grain arrow you'd get approximately:
308 IBO
- 13.3 (for 40 grains over IBO)
- 15 (for tube + string leeches)
-20 (for 2" under IBO)
= 259.7 fps.
308 IBO
- 66.6 (for 200 grains over IBO)
-15 (for tube + string leeches)
-20 (for 2" under IBO)
= 206 fps
For a 390 grain arrow you'd get approximately:
308 IBO
- 13.3 (for 40 grains over IBO)
- 15 (for tube + string leeches)
-20 (for 2" under IBO)
= 259.7 fps.
02-13-2005, 06:19 PM
#7
Nontypical Buck
Join Date: Feb 2003
Location: St. Cloud MN USA
Posts: 1,757
RE: arrow speed
30" draw......350 grain arrow.......oh yeah....nothing on the string!
At 28" and 390 grains and a nock set, and small peep sight with no tubing, you'll probably get 265 to 270
GoodLuck!
At 28" and 390 grains and a nock set, and small peep sight with no tubing, you'll probably get 265 to 270
GoodLuck!
Thread
Thread Starter
Forum
Replies
Last Post
wolf6151
Technical
22
03-21-2011 03:03 PM
