Light arrow penetration
02-05-2008 | 03:32 PM
#31
Giant Nontypical
Joined: Feb 2003
Posts: 9,175
Likes: 0
RE: Light arrow penetration
When I go lighter for that flat trajectory and making it easy to hit those 40-75 yard shots, I drop all the way down to 177 grains - patched .490 round ball in front of 80 grains of Pyrodex RS in my Kentucky rifle for about 1600 fps and some 1000 ft lbs.
To me, ifthe critter ispast 30 yards, it ain't bowhunting.
To me, ifthe critter ispast 30 yards, it ain't bowhunting.
02-05-2008 | 03:32 PM
#32
Joined: Mar 2004
Posts: 13,082
Likes: 0
From:
RE: Light arrow penetration
Ok, I went to bowjackson.com and punched in some numbers. All things being equal, except arrow weight and speed, here are a couple results.
These first numbers are a 355 grain arrow, flying 318 fps.
50 yards; 297 fps w/ 69 pounds of KE.
Here are the same results, w/a 490 grain arrow, flying 282 fps.
50 yards; 268 fps w/ 78 pounds of KE.
The light arrow slowed down 21 fps and lost 10 pounds of KE. The heavy arrow slowed down 14 fps and lost 8 pounds of KE. So, in short, the heavy arrow retained 7 fps and 2 pounds of KE over it's lighter brother.
These first numbers are a 355 grain arrow, flying 318 fps.
50 yards; 297 fps w/ 69 pounds of KE.
Here are the same results, w/a 490 grain arrow, flying 282 fps.
50 yards; 268 fps w/ 78 pounds of KE.
The light arrow slowed down 21 fps and lost 10 pounds of KE. The heavy arrow slowed down 14 fps and lost 8 pounds of KE. So, in short, the heavy arrow retained 7 fps and 2 pounds of KE over it's lighter brother.
02-05-2008 | 04:20 PM
#34
Nontypical Buck
Joined: Aug 2007
Posts: 2,645
Likes: 0
From: York,Pa
RE: Light arrow penetration
ORIGINAL: mobow
Ok, I went to bowjackson.com and punched in some numbers. All things being equal, except arrow weight and speed, here are a couple results.
These first numbers are a 355 grain arrow, flying 318 fps.
50 yards; 297 fps w/ 69 pounds of KE.
Here are the same results, w/a 490 grain arrow, flying 282 fps.
50 yards; 268 fps w/ 78 pounds of KE.
The light arrow slowed down 21 fps and lost 10 pounds of KE. The heavy arrow slowed down 14 fps and lost 8 pounds of KE. So, in short, the heavy arrow retained 7 fps and 2 pounds of KE over it's lighter brother.
Ok, I went to bowjackson.com and punched in some numbers. All things being equal, except arrow weight and speed, here are a couple results.
These first numbers are a 355 grain arrow, flying 318 fps.
50 yards; 297 fps w/ 69 pounds of KE.
Here are the same results, w/a 490 grain arrow, flying 282 fps.
50 yards; 268 fps w/ 78 pounds of KE.
The light arrow slowed down 21 fps and lost 10 pounds of KE. The heavy arrow slowed down 14 fps and lost 8 pounds of KE. So, in short, the heavy arrow retained 7 fps and 2 pounds of KE over it's lighter brother.
Im learning something here!
02-05-2008 | 04:48 PM
#35
Joined: Feb 2006
Posts: 2,877
Likes: 0
From: Kodiak, AK
RE: Light arrow penetration
ORIGINAL: Roskoe
So what does this all mean for hunter in the field? The faster arrow is going to have a little better trajectory - for shots beyond 40 yards. And a little better time-of-flight to thwart the wary whitetail from jumping the string.
So what does this all mean for hunter in the field? The faster arrow is going to have a little better trajectory - for shots beyond 40 yards. And a little better time-of-flight to thwart the wary whitetail from jumping the string.
, please tell me you joke? 
The reaction time of a deer is faster than any arrow will EVER travel. I mean really, how far do you think an arrow can travel in .15 seconds (the time it takes a deer to react to a sound)? If jumping the string is your reason then you're better off shooting the heavy arrow which absorbs more energy from your bow resulting in a shot that the deer won't hear and therefore won't react to.
