Quantcast
  1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Scope touching barrel...Problem?

Discussion in 'Rifle Country' started by marksman13, Apr 10, 2008.

Thread Status:
Not open for further replies.
  1. marksman13

    marksman13 Member

    Joined:
    Oct 3, 2006
    Messages:
    1,428
    Location:
    Mississippi
    So, I bought a CZ 527 Varmint Laminated from Xring about two weeks ago. I love the rifle. The trigger is great. It seems capable of being very accurate. However, I am having a hard time finding rings to fit the scope that I want to mount on it. The scope is a Millett 4-16x56. Tried a set of high Warne rings and the scope mounted, but the scope was just slightly touching the barrel. As I understand it, this isn't particularly good for barrel harmonics and could cause some accuracy problems. How big of an issue is this?

    I've got a set of Millett extra high rings that should be here tomorrow, but if they don't work, what are my options? Thanks guys.
     
  2. Horsemany

    Horsemany Member

    Joined:
    Jan 6, 2007
    Messages:
    1,320
    Location:
    Midwest
    Not good! You don't want anything touching the barrel or the scope. If you can't get rings that will work, I would get a different scope. The scope would likely be stressed if you could get the rings to tighten down even. If you want a scope that sits taller than rings will allow than you will be causing other problems by having a scope up in the air like that. You will have a hard time getting your eye tall enough without an extra cheek piece in most cases. There is generally little to be gained with an objective lens that big. Especially on varmint guns that are mostly used during the day with plenty of light.
     
  3. Shawnee

    Shawnee member

    Joined:
    Oct 17, 2006
    Messages:
    3,306
    Location:
    Along "That Dark and Bloody River"
    Hi Marksman....

    Within reason, you can use a shim between the barrel of the scope and the interior of the bottom ring(s). This can provide a small amount of clearance. You may also be able to use a shim underneath the bases, and with using the two shims achieve sufficient clearance.

    Best by far, of course is to find some rings that will accomodate that scope without any "homegrown solutions".

    I've seen a .243 that didn't appear to suffer with the objective bell touching lightly against the barrel - but the scope (a new Redfield) only lasted about a year.

    "Horsemany's" comments are right on too. Personally, I wouldn't buy a scope large enough to lessen the anchor of my cheek on the stock. That anchor is more important than even having a scope.

    Good Luck !!

    :cool:
     
  4. HGUNHNTR

    HGUNHNTR Member

    Joined:
    Nov 17, 2006
    Messages:
    2,541
    Location:
    Georgia
    It has little to do with bbl harmonics, and more to do with not ruining your scope. You don't want a vibrating barrel touching your scope.
     
  5. Vern Humphrey

    Vern Humphrey Member

    Joined:
    Dec 30, 2002
    Messages:
    18,719
    Location:
    Deep in the Ozarks
    That's the problem.

    Personally, I never use high magnification scopes -- in 50 years of hunting, I have used a 3X9 set on 9X only once. And the large objective bells and need for high mounts is only one of many reasons.
     
  6. Shawnee

    Shawnee member

    Joined:
    Oct 17, 2006
    Messages:
    3,306
    Location:
    Along "That Dark and Bloody River"
    Hi Vern...

    LOL ! :D

    I know what you mean, Vern. I hunted with Redfield Widefield 2x7 scopes for more years than I will admit and they spent 99% of their time set on 5x, or less. When I moved back to Ohio where I can shoot woodchucks I happened upon a used heavy-barreled rifle that already had a 4x10x42 on it. I just checked it and it's set on 6x. :D

    :cool:
     
  7. JWarren

    JWarren Member

    Joined:
    Jan 5, 2007
    Messages:
    4,632
    Location:
    MS and LA

    But be a dusk and dawn deer-hunter and you will start paying a LOT of attention to light transmission and objective sizes.


    -- John
     
  8. Vern Humphrey

    Vern Humphrey Member

    Joined:
    Dec 30, 2002
    Messages:
    18,719
    Location:
    Deep in the Ozarks
    The human eye can dilate to about 7mm. A scope (or any other optical instrument) with an exit pupil (the spot coming out the ocular lens at focal point) over that size is simply wasting light.

    Exit pupil is calculated by dividing objective lens diameter by power. A 4X scope with a 28mm objective lens will give you a 7mm exit pupil -- all you can use.

    A 2 1/2 X 20 will give you an 8mm exit pupil -- more than you can use.
     
  9. eliphalet

    eliphalet Member

    Joined:
    Apr 16, 2007
    Messages:
    1,682
    Location:
    Idaho
    Go to Brownell's web site and look up your rings, the different heights will be there for you to compare.

    . They may still have charts where you can compare rings to scopes, or at least objective bell sizes, to particular guns. Leupold used to, maybe still does but there you Will only find their products. Either way it is a Good idea to do before you buy mounts and rings. Good luck

    Vern is correct as the human eye can only gather so much light no matter the objective lens size.
     
  10. dagger dog

    dagger dog Member

    Joined:
    Jan 30, 2008
    Messages:
    2,706
    Location:
    SO. IN
    You may think about a different mount some of them are higher , and give a little mor clearence.
     
  11. JWarren

    JWarren Member

    Joined:
    Jan 5, 2007
    Messages:
    4,632
    Location:
    MS and LA

    Right.


    But if you use higher power, you would have to use a larger objective to get the same light transmission.

    I've hunted most of my life with a 4X fixed optic. I know it CAN be done. But I prefer a 3x9 these days, and practically every hunter I know around here does as well.

    My point about light transmission was highlighted last season.

    My father was using a Simmons 3x9x50 on a rifle where my mother was using a Nikon 3x9x40. They were hunting in the same area. However, the superior transmission of the Nikon had my mother being able to see 10 minutes longer than my father.

    The point being that light transmission at dusk and dawn do matter.

    We are getting into a whole new thing regarding objective size. I was never operating from the assumption that one would operate with a 4X optic.


    -- John
     
  12. pgeleven

    pgeleven Member

    Joined:
    May 17, 2007
    Messages:
    728
    Location:
    traverse city, mi
    i agree that if its touching the barrel you may be stressing the scope, get it off your weapon until the new rings arrive! and once the barrel whips that scope bell enough times you are more than likely going to cause a cancer that will lead to that scopes early demise. personally i wouldnt try for a 56mm objective lens knowing that i would risk losing my cheek-to-stock weld, if light is an issue a 50mm should do just as much as a 56mm, or get a nice Leupold Alumina kit if your scope can 'wear' one.
     
  13. marksman13

    marksman13 Member

    Joined:
    Oct 3, 2006
    Messages:
    1,428
    Location:
    Mississippi
    Thanks for the responses guys. First of all, I do have a cheek pad ordered for the rifle, so cheek weld won't be an issue.

    Second, the scope has already been purchased, so I've gotta make it work somehow.

    Third, according to the charts I read, the high Warne rings should have worked.

    I took the scope off until my new rings come in, but when I tried to mount it, I noticed that I could see daylight between the scope and the barrel. There just wasn't enough clearance for a dollar bill to pass through. At least there appeared to be daylight showing through. The new rings should fix the problem.

    I hadn't thought about the scope being ruined. I guess even a .223 would hurt it if it kicked it long enough.

    I hope I can get this rifle straightened out soon. I've got to grind a few spacers to put on the butt stock and install that cheek pad. If the new rings work I will be golden. I hope..........
     
  14. skinewmexico

    skinewmexico Member

    Joined:
    May 22, 2006
    Messages:
    2,621
    Location:
    West Texas
    You could always put a Farrell or EGW 0 MOA base on it, and probably use medium rings.
     
  15. RugerOldArmy

    RugerOldArmy Member

    Joined:
    Sep 18, 2004
    Messages:
    924
    Location:
    Earth, Milky Way
    Deleted...missed that you had the Warne High rings already. I don't know if the CZ rings are higher for a 527.
     
  16. Dr. Tad Hussein Winslow

    Dr. Tad Hussein Winslow member

    Joined:
    Nov 14, 2007
    Messages:
    13,146
    My opinion:

    1. First, nice rifle - I'm very jealous.
    2. On the scope, it depends on just HOW much / how "hard" that it's touching - how much more room does it need to be freed up? If it's more than about 1/64th, then no I wouldn't do it. If it's just snugging up when you tighten down the scope, I don't think you'll hurt the scope or your barrel harmonics. But if it's tightened down to the point of bending your scope, then you'll screw up your scope. So *touching* no big deal, IMO. Being torqued down, no.
     
  17. 22-rimfire

    22-rimfire Member

    Joined:
    Jun 11, 2005
    Messages:
    11,450
    Location:
    TN
    In my younger days, I only used fixed 4x scopes on my hunting rifles. I prefer 2-7x or 3-9x now for most things now. For varmints, the higher magnification is really a bonus for those long shots. Get the scope off the barrel and you will have a great rig!
     
  18. marksman13

    marksman13 Member

    Joined:
    Oct 3, 2006
    Messages:
    1,428
    Location:
    Mississippi
    Premiumsauces, if you knew how little I paid you would really be jealous. One of the best deals I have ever gotten on a firearm. The scope is just barely touching the barrel when the rings are tight. The new rings are Millett extra highs or something, so they should work out just fine. I'm just ready to get the spacers on the stock and start shooting.
     
  19. rangerruck

    rangerruck Member

    Joined:
    Jan 12, 2006
    Messages:
    8,374
    Location:
    Texas, baby!
    with cz's, and I've had a bunch, you almost have to get their factory hi rings. They will be high, but they will be absolutely great, and fit into the slots for the mounts just as intended.
     
  20. countryroads

    countryroads Member

    Joined:
    Nov 4, 2007
    Messages:
    7
    Location:
    West Virginia
    I also have a CZ527 Varmint with the heavy barrel. I also bought the Warne high rings and had the same problem with the scope that I had purchased.

    I did some research and finally selected Millett rings. They are the highest that I could find and they work great.

    The following measurements are the height of the ring from the bottom of the scope tube to the top of the ring base;

    Millett .663 inch
    Warne .535 inch
    Burris .500 inch
    Leupold .530 inch
    CZ .555 inch
     
  21. lvcat2004

    lvcat2004 Member

    Joined:
    Feb 29, 2008
    Messages:
    502
    Location:
    Las Vegas, NV
    Or get this:

    [​IMG]
     
  22. Dr. Tad Hussein Winslow

    Dr. Tad Hussein Winslow member

    Joined:
    Nov 14, 2007
    Messages:
    13,146
    ok, marksman, how much? :) (Yes, VX-Ls are sweet!)
     
  23. marksman13

    marksman13 Member

    Joined:
    Oct 3, 2006
    Messages:
    1,428
    Location:
    Mississippi
    You'll all be pleased to know that the Millett high rings fit like a charm. The rifle looks fantastic. I'll post some pitures tonight, but I'll put them in a new thread. Thanks for all the help guys.
     
Thread Status:
Not open for further replies.

Share This Page