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CHUCKO
By keeping "dope" on the loads, range, weather, temp, humidity etc. Re zeroing should be nill. It also takes time and patience.
You will probably notice that the lighter the bullet, will produce better @ short distances, where the heavier at the greater distances. This is only rule of thumb, not the standard cut and dried.
You must dope the ammo too. "Dope" (keep records of each firing.) What grain, lot number, did you use to get a good group on a day when it was 100 degrees, sun left, humidity 85% wind L front quarter @ 8 mph and what sight setting did you have?
Did you pre-foul?
Are you cold shooting?
What power on the scope, for what distance?
Sand Bag or Sling? (Leather, Canvas)
Shooting Glasses? (Perscription?) I don't use my glasses when using a scope.
Standing, kneeling, prone?
Did you zero for each range on that day?
These are just some of the things that must be taken into consideration. There may ever be something special you do that someone esle may not. As long as it is consistant, use it. Add it to your "Dope"
HJN
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