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Re: Early M73 Breech Blocks

Posted by Dick Hosmer on Tuesday, 9 October 2012, at 5:22 p.m., in response to Re: Early M73 Breech Blocks, posted by Pete Nelson on Tuesday, 9 October 2012, at 4:26 p.m.

Pete, that would yet another variable - one not yet mentioned in this thread. I need to review the block milling sequence from OM22 to see - if I can - in which order the cuts interface.

Knowing that all/most parts were fitted into gauges (but not having those gauges at hand) it is a bit of a wonder that there are so many small differences.

Of course, none of the points discussed so far affect the fit with adjacent parts, and thus do not violate the 100% interchangeability rule - so, it may be that certain non-essential contours were allowed to float a bit, so as not to reduce output to one or two blocks a day!


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