I have a question concerning sighting in a .22 rifle (3X9 scope) that I hope you can answer. From a practical point of view, what I want to achieve is to hit more gophers at various ranges-up to perhaps 100 yards- and therefore would prefer my rifle to be sighted in to the optimal range. While my targets are generally at 50 yards or less, I recently read somewhere that it is best to sight in a .22 rifle at 75 yards (vs 50 yards) because, according to ballistics tables, the bullet trajectory of the bullet is, at maximum, about 1.25” high up to 75 yards,. I suppose the rationale, (theoretically anyway) is from 0 to 75 yards out, you will always strike your target as long as you aim center of your 4” target. I accepted this rationale, and at seasons end (winter has arrived here in Canada) I changed my sight-in range from 50 yards to 75 yards. Since I did this though, I am wondering if I made a mistake changing my sight-in range. What has me questioning this change, is the following:
With your rifle sighted in at 75yards, if you are aiming at a target 75 yards down range, according to the ballistic tables, your .22 bullet will be about 1” high 50 yards out. But what happens when you actually aim at a target that is 50 yards down range? Will the bullet be high or low or on target, relative to the two target ranges?
Conversely, I am guessing that this also means that if your rifle has been sighted in at 50 yards, and you actually aim at a target 75 yards down range, some similar effect will be at play (whatever that might be). So, would the bullet be high or low, or on target, again relative to the two target ranges. I am back to my original question-what is the best range to sight in a .22 rifle?
I guess, in the final analysis, the probably doesn’t matter a whole lot. But I’d sure like to know and understand the facts about this.