Is measuring MOA at 100 yards useful for a long range target rifle? I say NOT

[dastt]

180 rounds? What was your procedure to net 180 rounds?

Initial testing was only about 40 rounds but I fine tune seating depth but I usually shoot it for a bit and really get a feel for the group sizes before I try another. I know I could do it in a lot less but I like to shoot a lot and I'm still learning the mechanics of tuning loads and the way I see it is through trying things.