Frank Lopez wrote:I'm not quite sure how, exactly, you're fudging the numbers, Ned, but just as an example, on Page 208 of John Taylor's "Shotshells & Ballistics" the data for a 1 1/4oz load of #2 steel (this particular one by Kent) with a three foot velocity of 1400fps, has the following velocities and energies:
V = 625fps
KE = 3.05ft-lbs
V = 551fps
KE = 2.37fps
V = 487fps
KE = 1.85ft-lbs.
That information is taken verbatum from the page listed. Actually, it's the last load listed on that page. It's there for anyone to see. The data is cross referenced several times in the book, and all references to #2 steel at 1400fps (three foot velocity) are identical. It also matches up well with a couple of ballistics programs. So please explain how it is possible that every reference has velocities at 50, 60 and 70 yards that are higher than yours are at 50, 60 and 65 yards?
Some things just never change.
The KPY data was created using the same formula for shotshell ballistics that Ed Lowery used only the KPY data is for the faster loads. The velocities up to about 1700 fps are the same with increased velocity in the KPY.
Who created John Taylor's ballistic data. You have to be a mathimatician before you can do it. Both the Lowery program and the creator of the KPY program are mathimatician. I have talked to both gents. Who did Taylor cross reference his data with?
When Steel became mandatory here in TX I got a Rangefinder so I could measure distances. When I hunted waterfowl then it wan't if you were going to get your limit, but how long it would take. Many years I helped kill 400-600 geese keeping distances birds killed and picking birds to see pellets. When I wasn't hunting geese I was also killing my limit of ducks. I picked everyone I shot. The data I gleaned from this matches the KPY data that I use. Due to the lack of water the waterfowling is slim to none now. A couple years ago I bought a new Rangefiner so I could range flying Sandhills. I tried three before I got one that would work on geese staying at the Park Pond here in Amarillo. I still get to hunt the Sandhills. Taking care of my wife who had both a heart attack and a stroke three years ago this Jun keeps me very busy. Jon who also hunted with a local guide who was a friend.