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Old 05-13-2017, 08:01 PM
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Is the front of the bolt supposed to contact the barrel breach face when the bolt is closed? This is on the 57-M action. Thanks.
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Old 05-14-2017, 02:24 PM
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I would think when your headspace is set properly, the face of the bolt is just against the breech end of the barrel or nearly so, with both the bolt face and breech end of the barrel exactly square. The head of the cartridge case is enclosed in the inset of the bolt face. Your headspace can be checked with a Go Gauge. I don't know if that answers your question.

Doug
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Old 05-14-2017, 06:11 PM
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Thanks Doug. After searching the internet, I think that the space between the bolt and barrel face is the headspace. That's if I understand what I read correctly. The article I read stated that on autos the bolt actually does contact the barrel face. Can't tell on my 1022, but on my Buckmark the bolt face does contact the barrel breach face. I am still a bit confused on this subject though.

Last edited by elohssa63; 05-14-2017 at 06:21 PM.
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Old 05-15-2017, 12:25 PM
Dennis D
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No. The bolt face should not touch the barrel on the Cooper. If you measure the rim cut in the face of the bolt it should be right around .037 to .038 deep leaving a few thou. of space between the bolt and barrel with a .043 head space. If you shoot Eley it should be clear that there is no contact from the build up of lube between the bolt and barrel.
Most semi autos use the barrel as a stop of course.



Dennis
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Old 05-15-2017, 01:04 PM
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Dennis, thanks for the info. I`m checking out everything on a used TRP-3 I bought, just to make sure everything is up to par. Les
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