measuring chamber length

dkish

January 14, 2010 11:44

sorry for the silly questions. this stevens 520 ive been asking questions about, is not marked 2 3/4 on the barrel like my others are. if i run a tape measure down the barrel to the ridge of the forcing cone, i come up with about 2 3/4. im i safe to assume its chambered for 2 3/4 inch shells? quess im getting peronoid in my old age!

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  perry shooter

  January 14, 2010 14:56

  Remember the shell that has a star crimp will get longer when fired all of this extra shell needs to go into the full diameter Chamber NOT the forcing cone.

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  Toolman286

  January 14, 2010 15:51

  It would be better if you used either a telescoping ID gauge/tool or a set of inside dividers. Set either .010" less than the chamber ID and insert it into the chamber until it stops. Note the distance on the tool & measure it. The chamber on my 12ga Stevens 620 is a little over 2 3/4" which is the length of a fired 2 3/4" shell. The 620 is not marked either & I don't know how the Ser #s run, but it's U555xx if that helps.

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