Last year, I was working on some microwave parts. I was measuring for phase change at approx 25 gHz.
I took a break and when I came back, the phase point had changed a bit. It was as if the
waveguide had gotten shorter..
Then, I laid my hand on top of the waveguide. Within a matter of seconds, I could see the phase was
shifting again. The aluminum waveguide part I was touching seemed to be getting longer!
Realizing it was my body heat, I fired up a heat-gun and wow! It really expanded when it got warm!
So, the last few times I have taken my rifle out back to shoot a little, it needed to be re-zeroed.
Today it was shooting a bit off zero, but slowly came back into zero after about 10 minutes of shooting.?.
Then a little LED when on over my head.
The stock is made from cast aluminum, but the laminated wood under it is bolted on with with a screw at each end.
When the temperature changes a few degrees, the aluminum changes length, but the wooden underbelly
doesn't expand at the same rate(if at all), so it sock is going to curve up or down, depending on the direction of the temperature change!
The barrel band is bolted to the stock. The barrel band is putting a slight down pressure on top of the barrel.
Which will change the POI with any temperature change!
I'm going to leave the front screw holding the laminated for-end loose as a goose for a while
to see if I'm right..
Cheers,
Rich
Believe nothing, no matter where you read it,
or who said it, no matter if I have said it,
unless it agrees with your own reason and
your own common sense. ~Buddha~
