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4200 Bushnell

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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: August/11/2008 at 22:54
timsk View Drop Down
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I have some issues Im trying to sort through and need some help.The gun a Thompson
Pro Hunter 338 win mag.bullet 225 gr Bear Claw.New 4200 Bush scope.This stuff is all brand new.the first 5  rounds through the gun the weaver rings failed to hold the scope in place due to recoil. went to three solid  steel Warn rings to hold the scope down tight.the
gun tends to group at 25 and  when I go out to 100 , I cant get good groups at all.I shoot off a sled bed so shots are steady as the can be.When I dicovered the scope was moving under recoil  could I have damaged it or could this scope just be defective? some times I get little impact change even though I have gone thru several clicks.  Now I think the
scope is tight with three rings and I think the gun is  not the problem .Maybe 225 GR bullets dont like this gun or does it tend to point to the scope.Im always  willing to take my share of blame but i can shoot better than my experience with this gun and scope.  thanks.I wanted  to take this rig elk hunting to BC Canada in sept but running out of time.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: August/12/2008 at 05:52
brodeur272 View Drop Down
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Are you using factory ammo or are you reloading?  It may just be the ammo you're using doesn't like your bore. 
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: August/12/2008 at 06:01
pyro6999 View Drop Down
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the 4200 is tested with 10000 rounds of 375h&h
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: August/12/2008 at 08:08
martin3175 View Drop Down
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As a rule , when I first try a gun out ..Day One isn't an accuracy day..put 2 rounds down range--thorough cleaning,,,2 more rounds..another cleaning...5 rounds...another cleaning....5 again ...another cleaning--now I'm set ...the barrel in a production grade rifles may need some conditioning before it's ready to shoot it's best groups. I then grab at least 3 different brands and / or bullet weights and back to the range. I will take a bore snake , and give it a quick clean after 10 rounds or so or between brands of ammo.. During all this, it is a great idea to check all screws on it ( scope and stock) to ensure they stay tight. Curious to know what brand and type of mounts you had that failed on you... The 4200 is well known for being well made and durable. I have a bunch, and they have performed as expected.. Give your 338 a  good cleaning, re-check those mounts ( too tight can be detrimental also ) , and get a few brands / bullet weights ( on a 338 you can find 180's up to 250's)  and head back to the range.. I believe you will find a combo that will work for you..
 
Also, on an Encore- make sure the forearm isn't putting any pressure on the receiver or barrel. Tighten the screws down , but don't muscle it too much. On the bench, don't rest the barrel on a bag either.


Edited by martin3175 - August/12/2008 at 08:33
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: August/12/2008 at 15:32
silver View Drop Down
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Are the rings round? If you have ring gaps are they equal? (hint: Why should you have gaps if everything is round and equal?)   Is everything mounted square?
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: August/12/2008 at 17:33
Sparky View Drop Down
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Your comment about a small POI change that is not consistent with the amount of adjustment you dialed in reminds me of a similar problem a friend had. His scope mounts were over tightened. He had tightened them by hand. When he loosened them and retightened them with a torque wrench his problem went away. From what I remember al rings are 15 inch lbs and steel are 20 inch lbs. But I would check to see what the manufacture recommends for your rings.

Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: August/12/2008 at 20:23
timsk View Drop Down
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thanks for the info.To many possibilities only more money will solve. Got to get off the factory ammo kick.
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