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Sears & Roebuck model 66
I am looking for some help, or, advice? My son recently obtained a High standard model 66 shotgun, in very good condition, for nothing. The only problem was it was in bits. As it turns out everything was there, and I have reassembled the gun.
My problem is that the adjustable pressure valve had been taken off, and I have been unable to find out how to set it up again. I have asked many here in the UK, gunsmiths included, but without success.
I do know that if there is not enough compression on the wavy disc springs, or, conversely too much, the gun will not cycle as it should.
The gun itself is a Sears and Roebuck, with a poly-choke serial number #583606 about 1964'ish.