How much KE are you shooting
07-23-2007 | 06:07 PM
#41
Nontypical Buck
Joined: Feb 2007
Posts: 2,188
Likes: 0
From: Balt, MD (orig: J-town,PA) The bowels of Hell!!!
RE: How much KE are you shooting
Going by some chart or even a program isn't very accurate for your velocity. You need to get it chrono'd. As soon as you add or remove something from the string it changes. OT2 was off by over 12 fps for my bow and arrow set-up based on Factory IBO.
07-25-2007 | 11:24 AM
#42
Joined: Jun 2007
Posts: 199
Likes: 0
From: southern ohio
RE: How much KE are you shooting
What is wrong with this picture Im getting 52 lbs of KE. Im shooting a 25 1/4 in arrow at 8.2 gpi. That only gives me a 327 grain arrow? how is everyone else shooting so many grains? My arrow and broadhead are 307 with about 20 grains for fletchings.The last time i chronographed my arrow it was 265 if the chrono was even correct that is. what is the problem? I have to be shooting faster than 265! is it common to lose 45 fps off ibo?? with such a light arrow? Im a 28.5 in draw with 63 lbs on a hoyt havoctec
07-25-2007 | 11:36 AM
#44
Joined: Feb 2006
Posts: 2,877
Likes: 0
From: Kodiak, AK
RE: How much KE are you shooting
ORIGINAL: stevezt4
What is wrong with this picture Im getting 52 lbs of KE. Im shooting a 25 1/4 in arrow at 8.2 gpi. That only gives me a 327 grain arrow? how is everyone else shooting so many grains? My arrow and broadhead are 307 with about 20 grains for fletchings.The last time i chronographed my arrow it was 265 if the chrono was even correct that is. what is the problem? I have to be shooting faster than 265! is it common to lose 45 fps off ibo?? with such a light arrow? Im a 28.5 in draw with 63 lbs on a hoyt havoctec
What is wrong with this picture Im getting 52 lbs of KE. Im shooting a 25 1/4 in arrow at 8.2 gpi. That only gives me a 327 grain arrow? how is everyone else shooting so many grains? My arrow and broadhead are 307 with about 20 grains for fletchings.The last time i chronographed my arrow it was 265 if the chrono was even correct that is. what is the problem? I have to be shooting faster than 265! is it common to lose 45 fps off ibo?? with such a light arrow? Im a 28.5 in draw with 63 lbs on a hoyt havoctec
You're shooting a 25.25" arrow with a 28.5" draw length? Are you using an overdraw?
07-31-2007 | 03:24 PM
#50
Joined: Feb 2007
Posts: 101
Likes: 0
From: Nebraska
RE: How much KE are you shooting
For an arrow = (arrow weight * velocity squared)/450240