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Hunting
Long Range Hunting & Shooting
Got a new rifle, sending it back to the factory
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<blockquote data-quote="SnowbirdUT" data-source="post: 1729480" data-attributes="member: 88029"><p>I had similar groupings from custom 338 LM rifle. When all else failed, I sent it to my current smith. It turns out the problem with that rifle was the crown was done poorly. He re-crowned the barrel and Voila! 1/2 MOA groups (one hole groups because the bullet diameter is large). I know use that rifle to shoot steel at one mile. </p><p></p><p>I've had that same smith build several rifles for me. One thing he does is check the barrel with a borescope BEFORE chambering the barrel. He looks for tool marks in the barrel that have not been removed with lapping. I recently built a 300 RUM with a Proof Research barrel. My smith did the same inspection before building the rifle. He told me that some of Proof's initial barrels had tool marks. This rifle is the best shooting rifle I have ever owned. My smith said he has not had a bad barrel from Proof in years and all good barrel manufacturers should be able to produce barrels without tool marks. </p><p></p><p>My point is that if the rest of your rifle set up appears to be good and you are still shooting 3" to 5" groups, it may be the barrel. The only time I've had groups that were that big that were not barrel related was when my scope rail was coming loose. The inability to feed is annoying but that is likely not the accuracy problem.</p></blockquote><p></p>
[QUOTE="SnowbirdUT, post: 1729480, member: 88029"] I had similar groupings from custom 338 LM rifle. When all else failed, I sent it to my current smith. It turns out the problem with that rifle was the crown was done poorly. He re-crowned the barrel and Voila! 1/2 MOA groups (one hole groups because the bullet diameter is large). I know use that rifle to shoot steel at one mile. I've had that same smith build several rifles for me. One thing he does is check the barrel with a borescope BEFORE chambering the barrel. He looks for tool marks in the barrel that have not been removed with lapping. I recently built a 300 RUM with a Proof Research barrel. My smith did the same inspection before building the rifle. He told me that some of Proof's initial barrels had tool marks. This rifle is the best shooting rifle I have ever owned. My smith said he has not had a bad barrel from Proof in years and all good barrel manufacturers should be able to produce barrels without tool marks. My point is that if the rest of your rifle set up appears to be good and you are still shooting 3" to 5" groups, it may be the barrel. The only time I've had groups that were that big that were not barrel related was when my scope rail was coming loose. The inability to feed is annoying but that is likely not the accuracy problem. [/QUOTE]
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Got a new rifle, sending it back to the factory
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