Elevation numbers

Where/how do you all get your elevation numbers?

Chairgun, trial and error etc....

Just realized reading a thread on another forum that my numbers came from a gentleman I shoot with in an email and for a completely different rifle!

Think that's a problem?

Chairgun first ((you'll need muzzle velocity, ballistic coefficient, zero range and sight height (center of bore to center of scope)) then field verification.

PPCalc for Android

AAFTA.org > Resources webpage > Trajectory Calculator- Rifle.

You can download a free excel spreadsheet from the AAFTA website.

I start by finding my zero (usually 30 yards), this assumes you already have the velocity figured out and set.  Then I get my clicks by shooting paper with horizontal lines at 10 yards, 20, 30 (already have), 40, 50, 55 & 60.

Then it is off the Chairgun or another ballistic software program to see if I can get the infill numbers.  I tweak scope height, ballistic coefficient and velocity to match my clicks I found by shooting paper.  Never the other way around.

I also break out clicks at 10.25, 10.5, 10.75 increments, up to 12 yards then its half yard increments to 16 yards.

Recently my indoor range to 55 yards was cut short to only 46 yards.  I used Chairgun to estimate my 47 to 55 yard clicks and verified them at the first local match I could enter.  I blind tested a few different BC's, velocities and scope heights until I found the closest match from 10-46 and used the remaining click numbers for 47-55, they worked out perfectly when I field tested them.

I have done this for 12 ft/lbs up to 20 ft/lbs in 177 and 22 for multiple pellet weights and it's spot on once I tweak Chairgun as needed.  I do not use the Chairgun generated information without the actual shot click numbers.  I did, once.  It's not even close.  BC's can change with two of the "same" barrels due to differences in the rifling depth, smoothness, materials, etc.

My current rifle (Thomas Carbine #1) running a poly barrel and 177 Monsters has a giant zero (26-32) and Chairgun will not do more than four sometimes five zero click yards.  So Chairgun doesn't fit my setup at all.  I had to make two charts, one for 10-30 and another for 30-60 in order to get it to work out to what the rifle was shooting. I have set up about six combos and this is the first one where Chairgun could not calc it all out in one chart.

What is the saying "Trust but verify."? 😉

Ray, judging from your recent performances, I'd stick with the email numbers ? 

Danny It's hard to change anything when it's working so good huh? Still trying to pick up what I can though. By the way I hear you did very well at the last match at Invicta, congratulations sir! It seems everyone is stepping it up a bit

I use the Scope Knob program from Eric Sanders. Very simple to use and costs $26

You figure your zero yardage then shoot at a dot at 10 yards. It will shoot low. You just hold the crosshair on the dot you aimed at, and click the elevation knob up until the crosshair reaches the pellet hole. Record the number of clicks. 

Then do the same procedure at 55 yards.  Then you just plug in the 10,  your zero, and 55 yard clicks, and the program does the rest. 

You still put in the scope height and speed, etc.

Every yardage is set and you print a tape for the elevation knob. It also does the side wheel tape too. 

I and many of our club members use it. I tried Chair gun, PPCalc, and Strayloc. Scope Knob is the easiest of them all, and on the money every time. 

Paul, I'm giving some thought to changing things up a little. 

Danny hooked me up with some new sidewheel's for my rifle and scope. I was so busy with work I only put yardage marks on my rifle and forgot about my pistol until I was packing it up the night before we left for Baton Rouge.

I put some marks on my pistol wheel right before the match. It was busy at the sight in range so I took a shortcut and only put a few marks on it.

Not having a card even, I put the holdover/under on my wheel next to the marks.

It was like second nature to range the target and read the holdover/under instead of yardage. Almost to easy.

When I shot my rifle the next day I thought about it often. May change my yardage marks to clicks and even eliminate some marks with duplicate clicks.

Always interested in what others are doing but don't want to get to nosey in the lanes ya know.

The numbers I got from Jim's program even have 10ths of a click! I always round off lol

Danny,

Ditto, I wouldn't change anything too much if I were Ray. I do about like Jim using paper targets with horizontal lines. I start at 10 yds., then move to 55 yds., and then drop back to 3o yds. Then I fill in by simply moving the targets to fill in the rest of yardages. It's a little time consuming , but it's accurate. Not that my scores show it. Never have trusted computers. Old school method ! I always do things the hard way. 

I do about the same thing for windage. Only I just use vertical lines and only have to use the 10, 30 and 55 yds. I had trouble with cant from 10-55 yds. For a good while I had problems with this. I was shooting high and right until I finally listened to Roz. 

It's good to see some of my buddies on here. See you Saturday.

Pat

Gonna be there Pat, it will be Alex's last match for the summer. He is going North for the summer again.