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Bol Tackshin posted it on the forum before but here it is in the 357. Had the sight and rifle for over 25 years and only got them together last year.
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I always found if you could see the target you could see the dot.
I did the most shooting with it on a shotgun for rabbits with a miners cap lamp clamped on the top of that as a poor man's big...

If you are left eye dominant me they are a doddle.
No batteries, but also no lenses to assist in the dark.
Used it on a 22. Pulled off a couple of silly shots with it
Got it on the rossi 357 la....