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HM-UK
Posts: 18 New Member
Sears & Roebuck model 66
HM-UK
Posts: 18 New Member
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.
Replies
I looked in the back of my Blue Book of Gun Values for the department store brands crossover list.
There's a chance that what you are calling the serial number is actually Sears' in-house model number structure. There's quite a few of those that start with 583, but none immediately obvious that finish with 606, and most of them have a decimal point in there somewhere. There was no federal requirement to serialize firearms until 1969.
Is it possible what you have is a STEVENS model 66?
If we can nail down what it is, we can probably pull up a schematic somewhere with the proper parts orientation.
How is the gun not cycling properly?
"Nothing is safe from stupid." - Zee
As I say, I know that to much pressure, or, not enough pressure on the wavy spring washers will result in a failure to cycle correctly. When I have this information I will be able to fine tune the pressure regulator.
Figure it was probably sold as a bird hunting gun. Start with bird hunting loads - probably 1 1/8 ounces of shot in the 1200-1300fps range - and your regulator set at the extreme end of NOT allowing gas into the system.
Also relevant: Since you have a polychoke, I would start with that cranked to full choke to MAXIMIZE how much pressure stays in the bore. (I once had to de-bug a Benelli M4 on which the owner had pimped it out with aftermarket crap until it stopped. As the OEM parts were restored, it got progessively better, but a tighter choke was key to getting it to run on a particular brand of low base slugs)
Run your collar progressively more open until the gun cycles, then open up the choke to see if it quits. Open the collar more until it runs with the choke at both extremes.
"Nothing is safe from stupid." - Zee
May be a week or two before I can get on with the work, too may people here and not enough space, so will need to get of the suburbs in order to test fire. But when I have done it I'll let you know what happened, or, pick your brains some more if other issues come to light.
Thank you all!
Not a lot of info out there, but I'll keep looking!
It’s a °IIIII° thing 😎
One of the features of the gas piston is that it was self regulating, it adjusts automatically to different power ammo. You may just have to wing it!! On the bright side, you'll probably be able to take it apart and reassemble it blind folded, until it's right!!
Maybe a picture if the piston would help!!
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Sometimes projects like these are a refresher course in Naval vocabulary!!