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Competition, Tactics & Training
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bad barrel or other gremlins?...
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<blockquote data-quote="uncle money bags" data-source="post: 2270650" data-attributes="member: 8377"><p>Without inspecting the gun myself it is hard to make definitive diagnoses. At best, all that can be offered are recommendations as to the most likely cause.</p><p></p><p>having said that, I have a couple of questions.</p><p></p><p>1. what brand of ammo are you using?</p><p>2. what is the condition of the bore, throat, rifling and crown? if you can take good pics, all the better.</p><p></p><p>It is true, your friends rifle has several strikes against it in the quality department. This isn't a criticism, but a realistic assessment that needs to be taken into account so you can have an honest expectation of what the gun will do.</p><p></p><p>considering the groups are so dispersed, and that the gun is benched with a good stop on the hand guard and stock, you can disregard upper and lower fit as the issue as long as it isn't super excessive. It would maybe factor in if you were using a mag well hold, but even then it would not usually affect the shot like you describe at the distance you are talking about. Upper and lower fitment; to a degree, has no real bearing on accuracy until you start talking about sub of sub m.o.a.( moboost, correct me if this seems counter to what your experience is).</p><p></p><p>If your friend is determined to keep this gun and not just sell it or trade it away then...</p><p>Before your next outing I would suggest these things:</p><p></p><p>1. clean and inspect the chamber, throat, rifling and crown. Any obvious issues? If you can scope it, all the better. </p><p></p><p>2. Check the fit of the barrel to the upper. Optimally, you will want to remove the barrel and re torque to spec using grease on the threads. Don't do this dry. If this is a foreign procedure for you or you don't have the tools, find somebody who does. It isn't hard to do, but if you are not familiar with the platform its better to have some body who is do it for you. After you have seen it done once, you are probably golden doing it yourself in the future.</p><p></p><p>3. re mount the scope, using blue locktite, or an equivalent.</p><p></p><p>4. If you are satisfied that the barrel is right, the scope is right, and an honest assessment of your own abilities is right, it is time to shoot. Bring more than one weight of bullet for your test. You stated the barrel was a 1 in 9. you should be GTG up to 69 gr pills without issue. Depending on the length of the barrel you may get along fine with heavier but I wouldn't count on it. Probably best to stick with 55-69. I have had guns that would not print better than 5 or 6 inches with 55 gr rounds but could shoot flys with 77's. nothing wrong with the barrel, it just didnt like 55's, but made sweet, sweet love with heavy match loads. It shouldn't be necessary for you to use expensive match loads for acceptable accuracy if the gun is up to snuff. However, better quality factory ammo will be more consistent and give you better results. (Unless you happen to be a competent reloader, then all bets are off).</p><p></p><p>5. At first, forget about zeroing the gun as long as it hits paper at distance. Sacrilege, i know. You should be able to bore sight it to this degree of accuracy. To make it easier try this at 50 yards if you want, and then switch to your zero distance after you verify good groupings. </p><p>Pick a target point in the middle of the paper and give it a go for 5 to 10 rounds. if everything is tight and GTG you should have a decent grouping somewhere on the paper, (3 inches or less). If you dont, then you will be wasting ammo trying to zero. If you are satisfied with the grouping, go ahead and zero that puppy, I mean mutt. Then you can experiment with the other weight rounds, your zero should not change drastically, but you will see a difference in the size of your groups.</p><p></p><p>I hope this helps. Please let us know how things go.</p></blockquote><p></p>
[QUOTE="uncle money bags, post: 2270650, member: 8377"] Without inspecting the gun myself it is hard to make definitive diagnoses. At best, all that can be offered are recommendations as to the most likely cause. having said that, I have a couple of questions. 1. what brand of ammo are you using? 2. what is the condition of the bore, throat, rifling and crown? if you can take good pics, all the better. It is true, your friends rifle has several strikes against it in the quality department. This isn't a criticism, but a realistic assessment that needs to be taken into account so you can have an honest expectation of what the gun will do. considering the groups are so dispersed, and that the gun is benched with a good stop on the hand guard and stock, you can disregard upper and lower fit as the issue as long as it isn't super excessive. It would maybe factor in if you were using a mag well hold, but even then it would not usually affect the shot like you describe at the distance you are talking about. Upper and lower fitment; to a degree, has no real bearing on accuracy until you start talking about sub of sub m.o.a.( moboost, correct me if this seems counter to what your experience is). If your friend is determined to keep this gun and not just sell it or trade it away then... Before your next outing I would suggest these things: 1. clean and inspect the chamber, throat, rifling and crown. Any obvious issues? If you can scope it, all the better. 2. Check the fit of the barrel to the upper. Optimally, you will want to remove the barrel and re torque to spec using grease on the threads. Don't do this dry. If this is a foreign procedure for you or you don't have the tools, find somebody who does. It isn't hard to do, but if you are not familiar with the platform its better to have some body who is do it for you. After you have seen it done once, you are probably golden doing it yourself in the future. 3. re mount the scope, using blue locktite, or an equivalent. 4. If you are satisfied that the barrel is right, the scope is right, and an honest assessment of your own abilities is right, it is time to shoot. Bring more than one weight of bullet for your test. You stated the barrel was a 1 in 9. you should be GTG up to 69 gr pills without issue. Depending on the length of the barrel you may get along fine with heavier but I wouldn't count on it. Probably best to stick with 55-69. I have had guns that would not print better than 5 or 6 inches with 55 gr rounds but could shoot flys with 77's. nothing wrong with the barrel, it just didnt like 55's, but made sweet, sweet love with heavy match loads. It shouldn't be necessary for you to use expensive match loads for acceptable accuracy if the gun is up to snuff. However, better quality factory ammo will be more consistent and give you better results. (Unless you happen to be a competent reloader, then all bets are off). 5. At first, forget about zeroing the gun as long as it hits paper at distance. Sacrilege, i know. You should be able to bore sight it to this degree of accuracy. To make it easier try this at 50 yards if you want, and then switch to your zero distance after you verify good groupings. Pick a target point in the middle of the paper and give it a go for 5 to 10 rounds. if everything is tight and GTG you should have a decent grouping somewhere on the paper, (3 inches or less). If you dont, then you will be wasting ammo trying to zero. If you are satisfied with the grouping, go ahead and zero that puppy, I mean mutt. Then you can experiment with the other weight rounds, your zero should not change drastically, but you will see a difference in the size of your groups. I hope this helps. Please let us know how things go. [/QUOTE]
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