Targeting/Old/New M1 Garand

[Clancy]

Gentlemen,
These two pic's show how Targeting was done on the M1 Garand. Top pic was very bad on the microfilm but it's the best I could do. Second pic I got direct from an Ordnance file copy.


GUYS I NEED SOME OF YOUR INPUT TIA

http://i24.photobucket.com/albums/c21/eclancy/targeta1.jpg

http://i24.photobucket.com/albums/c21/eclancy/questanew-1.jpg

Some data has been posted before others have not.

Gentlemen you know what to do.

Thanks again
Clancy

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FSS 90% / BW X Speed Div by 1000 = PF
THA 63

[M. Sage]

Wow, lock it in a vise and sight that sucker! That's quite the vise they're using. It's very industrial, looks like it's built like a mill or lathe. Should be VERY precise!

[RaceDay]

That second picture is quite impressive. So is the entire top assembly alllowed to float somehow on the base? I imagine something needs to "give" to take up the recoil.

[M. Sage]

I don't think it's actually floating, I think it's to allow for adjusting the POA. With that thing bolted down like that, you won't need to soak up recoil. And as sturdy as that thing looks, I don't see where you'd need to do it to keep the machine from being damaged.

[dw1784]

thanks Clancy.
Do you have any indepth info with the collimatry equipment? From pic 2, is it some form of optical comparator in use in the sight's physical alignment with a prescribed datum? akin to optical comparator used in QA/QC and modern day machine vision?

Only thing I found was this search article from Garand Collectors Association Journal and this member's only article on Garand sighting device from Journal of the Optical Society of America.
General info on Woodworth cradle from Midwayusa.com.

thanks again, Clancy

[tteng]

Looks like the rifle is swival-locked, separate from the main vice-stand, near the front-sight to allow the front end to swing upward to soak up the recoil. The back-end vice is spring-loaded grip-holding the center-of-gravity point of the rifle; and I assume there is some kind of padding to protect stock finish. I assume when the rifle was fired, the front end will swing up/back and the back end will rise slightly from the grip and then return to its original position.