I have a collimator type bore sighting device, picked it up at a gun show ( used ) for $30 along with a whole bunch of different calibers of bore "spuds"
One drawback, each different bore size requires a proper sized spud or rod that slides down the bore and the device clamps onto. Plus side- they are cheap<s>
I use mine for all sorts of things, like installing new open sights on muzzleloaders, etc.
It even worked when I scoped my revolver, got me close enough that I was on the paper with the first shot.
I like mine fine.
Jim
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Lay up some blackpowder and flints
The rest we can build, if need be
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