The slightest of errors in the scope, distance, wind and ammunition is magnified as the distance increases.
1 mph of wind at 50 yards is about 1/10" and 1/4 at 100.
Wind flags will often show a 180 degree shift in the wind without any discernible change in the ribbons.
Match ammunition will have variations lot to lot especially when it is produced on a different line.
Eley Match grades were produced on six different lines and recently I found the possibility of eight (maybe more).
Consecutive lots might be graded by Eley into TEAM, MATCH and TENEX.
The lot numbers on American produced ammunition mean absolutely nothing other than to the manufacturer.
Using a Harris bipod, adjust the legs one inch up on the left side, level and one inch high on the right will show the effects of canting.
Short of leveling your targets or putting a level at 100 yards and leveling your horizontal crosshair, might reveal a habit that has been there for years.
While wind flags are great aids, learning to read them can be challenging . . . some times they lie!
There are two sticky's in the rimfire introduction from 15 years ago by CZ452 that remain current to this date. They are the last two and well worth the read.
