I own a Cooey (Winchester) Model 600. It is already drilled and tapped on the right side of the receiver (4 holes). I've heard that I need a Weaver #2 side mount. I've also heard that it is easier to have a gunsmith redrill and retap top holes to fit more modern bases. Could anyone please share their experiences / tips?
Cooey 600 scope mounts
- Thread starter Marksman1918
- Start date
- Location
- Western Manitoba
You are kind of caught in a "time warp" - what that was designed for versus what today's expectations might be. Those four holes fit a sheet metal bended mount made by Weaver for their 3/4" (?) or 7/8" (?) ".22 scopes". Today we would consider those scopes very dim, not sealed, not particularly robust. But have been used to take millions of gophers (I am sure) out here on the Prairies. I, for one, thought they were a huge step up from the iron sights, at the time.
That Weaver side mount that you mention also fits those holes. But you also need the partner side mount rings - they come in two lengths - then you can mount a 1" scope onto your Cooey - I have done so a few times. I had thought the Cooey 600 had the dovetail grooves along the top of the receiver - maybe I am mistaken. Over the years, some felt that the 3/8" dovetails / 3/8" clamp rings "weren't good enough", (although what is used on Lee Enfield 303 British T0-1 rail) so some chose to drill and tap on top and install conventional bases with conventional 1" rings. If you want to mount a 1" tube scope on your Cooey 600, and if it does have those grooves, just buy the 1" scope rings with the 3/8" clamp size. Probably want to ensure your "new" scope has Adjustable Parallax - a cheap "high power rifle" scope will likely have significant parallax sighting error at rimfire ranges... "Rifle" scopes commonly are set parallax free about 150 yards; "rimfire" scopes often set parallax free at 50 or 60 yards.
That Weaver side mount that you mention also fits those holes. But you also need the partner side mount rings - they come in two lengths - then you can mount a 1" scope onto your Cooey - I have done so a few times. I had thought the Cooey 600 had the dovetail grooves along the top of the receiver - maybe I am mistaken. Over the years, some felt that the 3/8" dovetails / 3/8" clamp rings "weren't good enough", (although what is used on Lee Enfield 303 British T0-1 rail) so some chose to drill and tap on top and install conventional bases with conventional 1" rings. If you want to mount a 1" tube scope on your Cooey 600, and if it does have those grooves, just buy the 1" scope rings with the 3/8" clamp size. Probably want to ensure your "new" scope has Adjustable Parallax - a cheap "high power rifle" scope will likely have significant parallax sighting error at rimfire ranges... "Rifle" scopes commonly are set parallax free about 150 yards; "rimfire" scopes often set parallax free at 50 or 60 yards.
I think you have mixed up right and left...
The Cooey 600 ejects cases more or less straight up... so the scope requires mounting off to the left slightly. If you can find the old mount you also need to find an old scope to fit it...
On the both types of Mount the Weaver #2 side mount is also the listed mount for several 12 gauge shotguns and I've set up and used the TO1 mounts with the 3/8 dovetail on Lee Enfield so both methods are going more enough to cope with the recoil of a .22. Re drilling the holes is overkill in my opinion.
Drilling and tapping for scopes is also not a easy job as it sounds. It takes a lot of presion and it is very easy to screw it up. I've mounted several bases on Cooeys they are not easy and the barrels are not exactly presion engineering so if you do want to try and drill the holes don't trust the receiver to be accurately aligned to the barrel or even the barrel to be perfectly straight and not to have a bend in it. I always drill the bases to a bore sight.
Drilling and tapping for scopes is also not a easy job as it sounds. It takes a lot of presion and it is very easy to screw it up. I've mounted several bases on Cooeys they are not easy and the barrels are not exactly presion engineering so if you do want to try and drill the holes don't trust the receiver to be accurately aligned to the barrel or even the barrel to be perfectly straight and not to have a bend in it. I always drill the bases to a bore sight.
You are right I clearly mixed up left and right, I wrote this without looking at the rifle.
I have an original scope and mount off a Cooey Model 60. I think that would fit your rifle. Let me know if you are interested.
lockmancpl
New member
- Location
- Vancouver BC
The old Cooey was at the range today with the #2 side mount and clamp rings like Potashminer said. Works well, still shoots better than I do. The challenge comes in with more modern scopes, they have a large bulge around the middle for the sighting adjust mechanisms. Old style side mount rings often do not have the height clearance for that. Some finesse (field modification) may be required to the #2 mount to provide additional clearance. The four screw mount (2x2) on the clamp rings holds very well, but may have a tendency to roll the scope off vertical center-line as you tighten them down.
