Today was day two at the range with my new Ruger Precision Rifle in 6.5 Creedmoor. Mrs Graybeard and I got down to the range a bit late this morning, due to my making a dumb mistake setting the alarm on my phone, but we were there between 8:15 and 8:30. I took one shot at 25 yards to verify my zero was still there and bouncing the scope and its rifle around for a while hadn't messed it up. Then I went to 100 yards with some Hornady Precision Hunter ammo. This uses the 143 grain ELD-X bullets but is not "match grade". I got this in an honest three shot string. The shot on the left was just to make sure I could get on the target.
Ballistic App told me that with a 25 yard zero, the bullet is still rising, and it would hit a little under 6" above where the crosshairs on the scope reticle mark 0. With my cross hairs right on the bottom edge of that target, that hole is where it hit - and it's 9" above the the bottom edge. The next three are the one I call my group because they were the next three shots. There's a fifth hole just to the left of and below that group which was later with a different type of round.
We left by a little after 10, and it was hitting 90 already. This time of year, I expect that no matter what you're doing outdoors, you should be done by 10. 11 if it's unusually cloudy.
Now there are things I want to understand better here. I want to understand why the Ballistic App says that the bullet I'm using should be at 5.65" above the point of aim, but it's more like 9". I need to understand the sources of error there. An obvious contributor is that my zero at 25 yards isn't really zero, it's about 1/4" high (the bottom two holes here). That implies my actual zero is closer than 25 yards. (You're shooting up to get the bullet and optical paths to intersect at a distance. If it's high at that distance, it means it has already gone through that intersection and is still rising). Graphically (and exaggerated) (source):
It is a good hobby for geeks and the anal retentive (and anal-retentive is hyphenated, dammit!!) But as long as I'm doing a picture-intensive post, I may as well go for a little humor, too.