Marlin Rear Sight "Aha!"

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Dec 1, 2006
western Pa.
I've been shooting rifles with slider adjusted rear sights for about 50 years but it was only today I discovered something I never noticed before.
Before I went to the range to sight in my Marlin Glenfield 30A 30-30 I took some measurements of the rear sight and calculated the change of impact at 50 yards for each notch of the slider. Turns out the slider was made to give a precise 1" elevation change in POI at 50 yards for each notch. It was actually designed that way.
Are the rear sights on other rifles made that way too? OK, maybe I'm slow on the uptake, but be honest, am I the only one who never knew this before?
I am an Alumni of Cooper High School, our Mascot was the Hawk, I was hunting geese some 30 years later and a "Coopers Hawk" buzzed our decoys. After seeing this and seeing Coopers Hawks for some 30 years I made the connection to my high school mascot.
How is that for slow on the uptake?
If you notice, the Marlin sight slider is a much higher quality part then the simple stamped steel sliders on most rifles.
The machined Marlin slider could be made to exact size to allow more precise adjustments.
The rear sight on an IMI Timber Wolf is designed to be adjusted in 25 meter increments per step. Rifle is calibrated for 158gr boolitz.
The M1 Garand sights are metered in 1 minute per click as are the A2 sights on an M16 (20")

For those not metered, a sight adjustment of about the thickness of a sheet of paper is about 1 minute of angle (+ or - depending on sight radius)
I guess one of the things that surprised me is that the rear sight slider was made with such precision on a "low end" rifle. Mine was made in 1978.
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