Velocity from chrono. Dope from ballistic program.

I like Shooter, but the one that you know to use is the best, if you have accurate data to input into it.

Yep, like most things in life; garbage in, garbage out.

That said, height of scope center above bore center is easily measured. Same with barrel twist, and length. Velocity can be measured with a chronograph (ask around, you shoot well enough and are responsible enough not to shoot the gear, I’ll bet some our local shooters will let you put some rounds through the screens).

Failing that, estimate your velocity from loading tables, run that through your ballistic calculator on your cell phone, then go go to the range EARLY in morning near first light and check actual elevations at the known distances (for instance, 300, 400, 500, 600). That info will be pretty dog gone good. Log it, and make a little chart of corrections for your ammo box lid or rifle stock.

I get a true 200 yard zero and enter the bullet bc and an approximate velocity into to ballistic app. I then shoot at two more distances maybe 400 and 600 yards to see where bullet strikes in relation to app program. I adjust the velocity in the app program to make it match the actual dope for these ranges and save it in favorites. It will be real close as far out as you want to go!

Steve, that’s a good tip.

Wynne, that’s another new trick for this old one trick pony! I could have lived to a hundred and never thought about Steve’s or your “work a rounds”.