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Binding during cycling

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#1 ronzo



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Posted 05 December 2015 - 07:33 PM

I loaded the barrels and after a little tuning and tweaking everything cycled just fine until I set the headspace .Then I test fired a couple of rounds in a couple of barrels. They fired OK and extractors also worked OK but then things began to bind. I noticed some marking and galling on the bolt caps. I polished them as wel as the cocking ring and tried agan with the same results. What is happening? I only have a problem after setting the headspace. Do I need to reduce the length of the bolts by facing the end caps? I used leaded stock for the caps. Looks like I should have used a harder material, maybe drill rod? hardened?
Suggestions would be most welcome.

#2 DonLans


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Posted 05 December 2015 - 10:38 PM

I had to chamfer the cocking ring and put a small radius on the end caps to keep them from rubbing on the way around.  I used blue to see where it was rubbing.



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#3 Cutter


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Posted 07 December 2015 - 02:09 AM

Hi Ronzo,
If your bolts are all the same length with the cap on,
you might check the location of the followers, they should be
held much closer than +/- .005 stated on the print.
Good luck

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