My BKL 260 mount had finally arrived last week, I have the mount installed on my RWS 52. I have taken every measure to insure success. The scope rail was degreased several times and so were the mounting surfaces of the scope mount plus all the cap screws were cleaned plus the threads in the mount. The mount I purchased was the model with the built in .007 barrel drop compensation. I had to carefully measure the mount to make shure I installed the mount in the correct direction. The mount has a 7 stamped on it and this goes to the front or towards the barrel.I used blue loc tite on all threads, then secured the 6 attaching screws, I started in the middle of the mount and then worked my way outward. I let the loc tite cure a full 2 days before doing anything with the gun. My first test was without the scope, I fired around 20 rounds just to see if the mount might move without the scope installed, all looked good, I have the mount about centered on the scope rail and am measuring from the end of the rail to the mount with a caliper to check that there is no movement. Next was to mount the Bushnell Trophy scope, again all surfaces of the scope tube and rings were cleaned and all cap screws coated with loc tite. This time I gave only 1 day now to let the loc tite cure up fully. I sighted the gun in with no problems, so far I have fired around 40 rounds so far and everything looks good. This is only my first test with this scope and mount combination, untill I fire say around 1,000 rounds or better I still can't advise that this is a perfect setup, but I am reporting that it does look very promising at this point. If failure does occur I am going to write another post as soon as possible with details, whether it be the scope or the mount.

for the info Randy! Good luck! Sounds like you took every precaution. We won't blame you if something fails

I 'm going to be ordering this mount in a few days and use the RWS 300 (4x32) scope my 350 combo came with just in case, and run with that for a couple of months to see if the scope holds up before I spend good $$ on a better scope.

How is the scope clearance with that mount? How big is your scope's obj. lense? 40mm?

The Bushnell Trophy has a 40mm objective, it has pretty decent clearance at that, I would say a 44mm AO would be as large as you could use, also depending on what length of scope you would use course this would apply to a gun like my 52 with the opening breech you would have to watch the length. I will post again as I continue to shoot the gun more, at this point my main concern is can the BKL mount hold without a stop pin, plus will the scope stand up as well. I agree with you and just try the 4x scope the gun came with and see how it does, I would imagine the scope is still okay at this point. Really a good solid mount is absolutley important, when I had the older version RWS c mount it could never hold, it held on the scope rail but the elevation adjustment could not stay. If you buy the BKL mount please post on how it does on your 350, the 350 I am shure has more recoil than my 52, it is a nice mount, if it works you may just stay with the scope that came with the gun and be set.

Again I am posting on my findings so far concerning the BKL 260 mount. So far so good actually, the Bushnell Trophy scope did slide in the rings ounce however and had to remove the scope and re loctite the screws and tighten up a bit more than I liked to but it did the trick. the scope tube is probably distorted a bit from this but there was no choice and it is now holding in the rings. I have fired 500 rounds so far and the mount is holding and the scope is also holding up, so this is a positive note here. The scope I am using is the Bushnell Trophy 6-18x40 target model, and is a newer one with its country of origin being from the Phillipines. Must be a fair scope to take the recoil of the 52 so far. Again I am surprised by the results, how long the scope will last we will see also, so I can say the BKL mount though is a decent choice for Diana guns since the 6 mounting screws it clamps with have seemed to hold on the rail. Other mounts with a stop pin would work but I did not like the idea of hanging a stop pin off the front of the rail and have it maybe hammer the front of the rail. Whether that is what happens when that is done I don't know but was a concern and someone else might be able to say yes or no that is what takes place. The scope rail they use seems to be a softer metal, thus when the identations are used for the stop pin they become egg shaped or the pin finally makes its way completely out, however the indentations are not very deep, at any rate I have to say I am pleased with a BKL mount for my Diana 52.

The BKL will hold the rail fine. The limitation on it is the single-band scope clamp (most BKLs have doule bands - which hold super-well). One trick I have seen is to snug the rear clamp against the back of the turret housing (or the front one agains the back of the front bell).

That is exactly what I ran into with the BKl mount is that it had trouble holding the scope in the rings, thanks for your post as I had never thought about securing the scope this way with this mount.

I always use a thin coat of Elmo's rubber cement on the rings. It stops the slipping and is easy to remove when you swap out scopes. Works great. Good luck!

Thanks for reporting on the BKL mount & Bushnell scope Randy!

I have not bought the BKL drooper mount yet but now I will. My 350 broke both my RWS 1pc. mount and RWS 300 scope! I could not sight in the scope any longer and it looked fuzzy and blurry no matter what I did. The scope was fine the first 2 weeks or so while it lasted but I 've been eyeing the Elite & Trophy scopes as well for a while now. Where did you get yours from? How do you like your scope? Would you recommend it? Have you done any long range target shooting like 40+yds?

Hi Harry, so far the Trophy scope has been real good on my gun, I have shot the gun at 50 yards as well with it, the Adjustable objective ring has been staying put the rear fast focus eye piece however did spin all the way out. I took care of this with some teflon tape like you would use to seal pipe threads, it holds the eye piece and does not leave tape tracks after. I am not shure if the Trophy could stand the recoil of the 350 magnum as I am shure it has more recoil than my 52 has. I purchased my Trophy from Optics planet as they take paypal so it just made it easier for me. After reading some of the posts now about scope issues and tuning etc. I also have more imput I can add about all of this. When I bought my 52 it was a used gun and soon after I used it I had to work on the gun. I am using all stock parts and I lube my mainspring with what JM sells called euro lube and moly paste for the piston seal. I had installed a new mainspring and the gun was pretty rough for about the first 200 rounds or so with fairly heavy recoil. I mounted the scope after firing the gun probably at least 300 rounds after rebuilding the gun. I noticed the gun was smoothing out at this point, so thus this might be another tip for scope useage here to let the gun settle in and I doubt it is my imagination that the recoil is now not what it was when I first put the new mainspring in. This may be one of the reasons I had better luck with the scope and mount as well. My 52 has been grouping about 3/4" at 50 yards so I figure that is about as good as I could ask for. I think there is for shure a difference in price in scopes the more you pay the better the scope gets, my choices would be like the Weaver V16 and maybe the Bushnell elite scopes, the Trophy is a good scope though but there is no way to know for shure about them unless you try one, but my guess is to go with the scopes that are for heavy recoil even if they cost more money.

Randy. I agree with you. My 350 is starting to settle down a little too. I have fed it about 375 pellets so far and it doesn't feel as twaangy as when I first got it. I could swear it even feels like it has less recoil.

I was leaning more to the Elite scope after ~750 shots or so and hopefully a lube tune when I decide to pack it up and send it to a tuner. I had my iron sights on a crow this morning but it was at least 40yds out and didn't feel comfortable so I didn't take the shot. There were about 20 of them on my property making way too much noise at 7am. If I had a scope a couple of crows would be laying there motionless now.

Enjoy your 52! I 'm sure the focus ring will stay in place now.