I sighted in my rifle (Savage Mk II .22 BTVS) in dead calm conditions. I zeroed it in at 50 yards, and with a few clicks' adjustment in elevation only, I was making very close to 1moa hits with junk ammo at 100yds.
This was shooting a couple degrees UP, laying prone.
Last night, it stormed hard. The town flooded out, and I was fighting flooding conditions here in the country.
Today, it is much, much less humid. When I sighted it in before, we were anywhere from 88% to 99% humidity, dead still.
Today, as I said, less humid (it's all in the creek!) and I have an eight to 10mph wind blowing.
I decided to shoot a few things from my alternate perch, which is about three feet higher than my usual shooting spot. It put me dead inline, or slightly above, my targets at 50 yards.
It looks like I'm hitting about 1/2" high.
Now, I know the POI raises when you shoot uphill, but by this much at 50yds?
I need less variables. I need to shoot from the same spot from which I sighted, but unfortunately I cannot post new targets since the humidity is now in the creek, which I must cross in order to get to even my 50 yard target holder.
So, in short, here are the new variables:
1. Sighted in at 50yds in dead still conditions. It is now 8-10mph from the east.
2. Changed from shooting slightly upwards to straight or slightly downwards, which is less comfortable for me.
3. Humidity is much less than previously.
Would the above factors combine to give me a higher POI with the same ammo? As I said, isolating the factors is kinda' out of the question right now.