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Rifles, Reloading, Optics, Equipment
Gunsmithing
CZ 550 Scope Mounting vertical problems
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<blockquote data-quote="bruce_ventura" data-source="post: 895132" data-attributes="member: 34084"><p>I had a similar problem when installing a scope on that model CZ rifle chambered in .375 H&H. After optically zeroing the rifle, the impacts were about 20" low at 100 yds, hitting dirt in front of the target. It was difficult to even see the impacts because there was so much dust kicked up. I was using CZ rings. Luckily for the customer, the scope had barely enough adjustment get to a 100 yd zero. </p><p></p><p>I concluded the problem was barrel vibration. The stock was solid and the impacts were in similar locations for two different shooters. I'll bet your rifle has the same issue. </p><p></p><p>I would normally recommend that you use Burris Signature rings with offset inserts, but I don't think they are available for the CZ long action. Next, I recommend that you change ammunition. Barrel vibration of this magnitude will vary a lot between different loads. Failing that, you could bed the scope in the rings to add about 20 MOA of elevation. See YouTube videos on this subject. Place a 0.032" spacer in the bottom of the rear ring and embed it in bedding material.</p></blockquote><p></p>
[QUOTE="bruce_ventura, post: 895132, member: 34084"] I had a similar problem when installing a scope on that model CZ rifle chambered in .375 H&H. After optically zeroing the rifle, the impacts were about 20" low at 100 yds, hitting dirt in front of the target. It was difficult to even see the impacts because there was so much dust kicked up. I was using CZ rings. Luckily for the customer, the scope had barely enough adjustment get to a 100 yd zero. I concluded the problem was barrel vibration. The stock was solid and the impacts were in similar locations for two different shooters. I'll bet your rifle has the same issue. I would normally recommend that you use Burris Signature rings with offset inserts, but I don't think they are available for the CZ long action. Next, I recommend that you change ammunition. Barrel vibration of this magnitude will vary a lot between different loads. Failing that, you could bed the scope in the rings to add about 20 MOA of elevation. See YouTube videos on this subject. Place a 0.032" spacer in the bottom of the rear ring and embed it in bedding material. [/QUOTE]
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CZ 550 Scope Mounting vertical problems
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