Originally Posted by Mike Harrell
The low position on the tang sight corresponds to the 200 blade and the high position does the same for the 300.

That sounds like it is used in conjunction with the barrel sights which makes great sense, especially if the shooter is a bit on the older side and over the hill as far as eyesight goes. I do much the same thing these days, though I will often put the aperture on my shooting glasses. Works great for me on lever guns and muzzleloaders in particular.

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BrentD, (Professor - just for Stan)
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