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677xx, Date of mfgr and chamber information

 
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saltydog452
Sideplate


Joined: 12 Nov 2008
Posts: 8
Location: Texas

PostPosted: Thu Jul 31, 2014 11:56 am    Post subject: 677xx, Date of mfgr and chamber information Reply with quote

Its a SXS, clean, tight, and well used, but not abused.

12 bore. Water table reads the 677xx number as does the lower left underside of the left barrel and the metal that the attaches the forearm to the barrel set.

Is it a 2", 2 1/2", 2 5/8", 2 3/4", or? How do I measure?

Since the star crip unfolds and there has to be additional room to accomodate the now unfolded length of the hull, how can I measure the chamber?

Thanks,

salty
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2-Piper
Optimus


Joined: 01 Mar 2007
Posts: 633
Location: Lynchburg, TN

PostPosted: Thu Jul 31, 2014 7:09 pm    Post subject: Reply with quote

Salty;
As you posted this query here on the Lefever forum I assume this is a Lefever gun with this SN. If so then a gun of this SN is getting fairly close to the end of production. If you look at the patent dates stamped into the trigger plate it will almost certainly include a 1907 date, meaning of course is was built later than that date. from that point in time the probability is very great it will be chambered for 2 3/4" shells in a 12ga. Chamber length is generally considered to be equal to the length of a new unloaded case or a fired one after the crimp has opened. There are several means of measuring this length. My favorite one is with a 6" flexible scale. It doesn't have to be a precision machinist's scale one of the $2.00-$3.00 ones from your big box home supply store will work just as well for this purpose. Remove the barrels, hold them up toward a light source & look through them. Do not use a Bright direct light but just a light background. You should be able to see the forcing cone at the forward end of the chamber as a shadow. Slide the scale down the chamber keeping one edge in contact with the chamber wall. When that forward corner just touches the shadow "Stop", read the length directly on the scale. This is a very inexpensive method yet with just a bit of practise has great reliability.
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