I've got an old Marlin Model 60 that I swapped the rear sight on last year and now shoots way too high. I removed the factory v-notch type rear sight and replaced it with a Williams peep sight mounted on the 38 dove tail rail. Now the gun shoots at least 6" high, even at 10 yards. I've run out of adjustment on the elevation. Because my son likes the peep sight SO much better than the original, I'm going to try shimming the front sight to raise it up, so it will lower the point of impact.
What is the best material to use for shim stock on a project like this? (Aluminum? Brass?) Where can I buy some locally (in Anchorage)?
At this point, I'm considering hacking up a soda can and using that.
Also, do the shims (I assume I'll need more than one layer) need to cover the entire bottom of the front sight ramp (necessitating me to drill a hole for the attaching screw), or will two pieces, one in the font and one in the rear of the ramp, suffice?
Lastly, does anyone have any idea how much change in front sight elevation will change point of impact? (for example, if I add .030 of shim under the sight, how far will that move the bullet point of impact at say 50 yards?)