[time-nuts] He is a Time-Nut Troublemaker....

[Bruce Griffiths]

If I recall correctly, the article was published in the Journal of the
Optical Society of America around that time or perhaps a little later.

Bruce Griffiths wrote:
> Chuck
>
> It was a paper written around 1942 detailing the procedures used to
> align the sights of mass produced rifles for which it was impractical to
> have each rifle individually adjusted on a firing range.
> Unfortunately I dont think I have a copy of this any longer, however
> I'll keep an eye out for it.
> The alignment jig used a mirror attached to a cylindrical plug that was
> a close slip fit into the end of the bore.
> It wasn't perfect but far better than not adjusting the sights at all.
>
> Bruce
>
>
> Chuck Harris wrote:
>   
>> Could you be more specific, and perhaps provide a reference?
>>
>> Paul Mauser's group was pretty fussy about sighting through the
>> new barrels, and bending them a little here and there to make sure
>> their bores were perfectly straight.  The WWII records on the M1 Garand
>> talk of using a bore scope to adjust the adjustible iron sights.
>> The WWII records on the M1 Carbine talk of the same technique.
>>
>> -Chuck Harris
>>
>> Bruce Griffiths wrote:
>>   
>>     
>>> Mark Sims wrote:
>>>     
>>>       
>>>> I got to play with a custom .50 BMG that shoots meaningful groups at 1500 meters...  the maker's definition of
>>>> "meaningful group" is "smaller than your head".  I managed to put two rounds through pretty much the same hole.
>>>> Don't know where most of the other 18 rounds went...  Then there was his .17 cal varmint rifle.  Does wonders for
>>>> groundhoggies at 500 yards.  Most gawd awful recoil through.  I was black and blue for a month.  The barrel and all
>>>> the hardware in those guns is finished to optical tolerances and maintains it despite having just a little less
>>>> energy than a small nuke going off each time you fire.
>>>>
>>>>
>>>>       
>>>>         
>>> The fact that the direction in which the last 4" of the barrel largely determines the initial trajectory of the
>>> bullet (in absence of crosswind etc) was made use of to assist in alignment of the sights during mass production of
>>> infantry rifles during WWII.
>>>
>>> Bruce
>>>
>>>     
>>>       
>
>
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
>
>