Reloading
N140 leads these 28 groups
28 groups from Oct 13 to Nov 7, 2026. N140 had the lowest averages. N133 was the highest. IMR 8208, CFE 223, and Varget overlap.
Notes on AI and shooting
Using AI to Improve Your Shooting
Practical notes on using AI to improve your shooting, at the range and at the reloading bench. They cover explaining a term, organizing your own observations, or drafting a checklist. You still check the result.
The articles and video on the site today are samples. Each one is marked.
Recorded sessions
What the charts show
Shot 1 runs about 36 fps faster
21 chronograph strings from Oct 19, Oct 20, and Nov 7, 2026. Shot 1 averaged about 36 fps faster than the later shots in the same string.
Nov 7 groups at 100 yards
Seven groups and 33 shots at 100 yards on Nov 7, 2026, in gusty wind. The tightest stated group is 0.40 inches. A single group is mostly noise.
N140 leads these 28 groups
28 groups from Oct 13 to Nov 7, 2026. N140 had the lowest averages. N133 was the highest. IMR 8208, CFE 223, and Varget overlap.
A fast first shot inflates velocity SD
The same 21 strings, with shot 1 kept in and taken out. Removing shot 1 lowers the within-string velocity SD for every powder listed.
From the archive
Latest articles
Range practice
Shot 1 runs about 36 fps faster
21 chronograph strings from Oct 19, Oct 20, and Nov 7, 2026. Shot 1 averaged about 36 fps faster than the later shots in the same string.
Range practice
Nov 7 groups at 100 yards
Seven groups and 33 shots at 100 yards on Nov 7, 2026, in gusty wind. The tightest stated group is 0.40 inches. A single group is mostly noise.
Watch
Videos
YouTubePlay video: Sample video: how a player looksSample
Sample video: how a player looks
Placeholder entry. The clip is Big Buck Bunny, a Creative Commons short film, used only to show the player. It is not a ShootersProof video.
Bring a question to the group.
Articles stay on this site. The Facebook group is for discussion, and YouTube is for the longer clips.