scope/ barrel interference?


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BigFatKen
December 30, 2006, 07:05 PM
I put in this thread about a scope with 50mm end. I got iit today and mounted it onto my Ruger M-77 today. However, the scope has a slight interference fit with the barell. I cannot slide a dollar bill under the scope/bll.

Can I fire this combo or will that crack a lens or worse?



http://www.thehighroad.org/showthread.php?t=242619

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rbernie
December 30, 2006, 07:08 PM
Can I fire this combo or will that crack a lens or worse?
I believe that you will damage the scope. I have found that, for example, Burris FFII scopes will contact the barrel and dent/harm themselves with even several sheets of paper worth of clearance. I cannot imagine what joy will occur with hard contact, but I would not want it to be my scope that's involved.

BigFatKen
December 30, 2006, 07:16 PM
I really thought I knew this but I hoped everyone would say, no go ahead.

It will just take time to buy higher rings, or is there another option.?

Walkalong
December 30, 2006, 07:21 PM
Just suck it up and buy different rings. Don't damage your scope. :)

redneckdan
December 30, 2006, 07:34 PM
i had this problem with a .22 match rifle. Next size up rings I had were too high for my liking. I went and got some brass shim stock. Put it between the scope and rings.

BigFatKen
December 30, 2006, 07:52 PM
I will dismount the scope and replace it with my 1976 Bushnell 3x9x32 Sportview.

The next ten days are the top days for deer hunting here. Oh, well, it was sooo close a fit. Better to be right than sorry.

Next year.

case closed for this year.

Hemicuda
December 31, 2006, 12:19 AM
for 30 bucks or so, your sporting goods store should be able to get (or may HAVE some factory Ruger hi-mount rings!

BigFatKen
December 31, 2006, 11:11 AM
I guess what I need is this:
http://www.artworkbyandy.com/rings.jpg
but they are $66.75 + shipping at Ruger and $51.98 at gunbroker. Are there any cheaper or knock-offs that are any good?

SwampFox
December 31, 2006, 05:02 PM
Contact Ruger. They may swap rings.

BigFatKen
January 2, 2007, 05:12 AM
Thank you, I did not think of that. Its now on my Ruger .10-22 where it is WAY too much scope.

rustymaggot
January 2, 2007, 05:24 AM
if you dont want to get higher rings you can use soda can shims and shim it up a little.

BigFatKen
January 2, 2007, 08:10 AM
if you dont want to get higher rings you can use soda can shims and shim it up a little.

How much is the safe amount?

1976 M-77 tang safety. .25-06 120gr loads. I'm afraid now that barrel whip will break it.

308win
January 2, 2007, 08:33 AM
I don't think barrel whip will be an issue if you shim it ( I would use brass shim stock). Millett makes Ruger rings that are not as pricey as Ruger original equipment. Midwest, Brownells, etc. carry them

Hemicuda
January 2, 2007, 10:38 AM
I do not think you dare use the soda-can shim trick with factory "grooved for rings" Ruger reciever...

USUALLY the shims go UNDER the scope mount base... and the Ruger does away with this piece, instead grooving the reciever for special rings that direct-mount... if you shim the rings, you'll screw up the ring-base engagement with the reciever.. and if you shim the scope INSIDE the rings, you'll crush the scope tube...

I wouldn't try this with the factory Ruger asssembly...

BigFatKen
January 2, 2007, 11:26 AM
I wouldn't try this with the factory Ruger asssembly...

I was wondering how much torque to apply to a ring screw with .050" of shim stock in it.

Sounds like it slips or crushes.

Hemicuda
January 2, 2007, 07:04 PM
Ken... the problem is that you have to "line" the whole bottom ring half to keep from creating a"dent" with just a small shim in the bottom... and when you do that, you are filling about half the diameter of the ring...

the clearance on rings is a "mechanical press fit" already, between the scope tube and the ring, that means that when you add material in between the two, where will you get the space for this "shimstock"? Since the rings are solid metal (usually steel), and relatively thick, and the scope tube is thin, hollow aluminum tubing, the scope gets crushed...

rustymaggot
January 2, 2007, 11:47 PM
it has been my experiance that as long as the scope is clear of the barrel, its not going to get damaged from contact. one or two thicknesses of soda can wall under the base should be enough and has never caused any damage that ive seen. your results may vary.

Hemicuda
January 2, 2007, 11:59 PM
please read the posts and look at the pic... he DOES NOT HAVE SCOPE BASES... he has the Ruger factory MILLED RECIEVER and the ONE PIECE RUGER rings made to interlock into the milled action... NO BASES... can't shim them, because it'll screw with the CLAMPING FORCE of the ring-to-action fit!

rangerruck
January 3, 2007, 03:40 AM
you will also throw off your bbl harmonics in the toilet.

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