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Rifles, Reloading, Optics, Equipment
Gunsmithing
Cold Fouled Barrel POI
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<blockquote data-quote="J E Custom" data-source="post: 1193650" data-attributes="member: 2736"><p>This is not uncommon with some barrels. Some need a fouling shot, and some don't.</p><p></p><p>I have several that need one shot first and then go to the POI for 5 to 7 shots. Other barrels don't need the fouling shot and remain on the POI until they get 5 to 10 shots down them.</p><p></p><p>On the barrels that need the fouling shot, first I thought it was the oil left in the barrel that caused it, so I dry patched them well. they were better but they still needed one shot to be dead on. so now I fire a 5 shot group to verify mu zero, clean well and fire one shot (To foul) and I am ready to go with a good first shot in the field. I will pull a dry bore snake through the bore to remove powder residue</p><p>before hunting.</p><p></p><p>On the other barrels that place the first clean barrel shot at the POI the only thing I do is dry patch</p><p>before shooting.</p><p></p><p>If a barrel has oil in it, it will change the pressure and velocity slightly causing the shot to go high and left or right depending on the twist direction. I prefer to clean all barrels good and oil them slightly for storage until I am ready to shoot them. the only difference will be that some will get one fouling shot and the others wont.</p><p></p><p>The ones that need the fouling shot, still shoot well below 1/2 MOA and some well below 1/4 MOA</p><p></p><p>In my opinion, A clean barrel is the most consistent for the first 4 or 5 shots (More than is necessary while hunting) and a fouled barrel is more consistent when shooting matches of more than 20 shots</p><p>though not as accurate. Most barrels will lose there best accuracy after shooting 4 or 5 rounds (That is the reason getting a group of more than 5 shots to maintain best accuracy is difficult and at some point around 7 to 10 rounds will settle down to consistent usable accuracy.</p><p></p><p>So if the rifle will shoot good groups after being fouled, there is probably nothing wrong with your loads or the rifle, It is just a characteristic of the barrel.</p><p></p><p>Just my opinion based on my experiences with the same problem.</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 1193650, member: 2736"] This is not uncommon with some barrels. Some need a fouling shot, and some don't. I have several that need one shot first and then go to the POI for 5 to 7 shots. Other barrels don't need the fouling shot and remain on the POI until they get 5 to 10 shots down them. On the barrels that need the fouling shot, first I thought it was the oil left in the barrel that caused it, so I dry patched them well. they were better but they still needed one shot to be dead on. so now I fire a 5 shot group to verify mu zero, clean well and fire one shot (To foul) and I am ready to go with a good first shot in the field. I will pull a dry bore snake through the bore to remove powder residue before hunting. On the other barrels that place the first clean barrel shot at the POI the only thing I do is dry patch before shooting. If a barrel has oil in it, it will change the pressure and velocity slightly causing the shot to go high and left or right depending on the twist direction. I prefer to clean all barrels good and oil them slightly for storage until I am ready to shoot them. the only difference will be that some will get one fouling shot and the others wont. The ones that need the fouling shot, still shoot well below 1/2 MOA and some well below 1/4 MOA In my opinion, A clean barrel is the most consistent for the first 4 or 5 shots (More than is necessary while hunting) and a fouled barrel is more consistent when shooting matches of more than 20 shots though not as accurate. Most barrels will lose there best accuracy after shooting 4 or 5 rounds (That is the reason getting a group of more than 5 shots to maintain best accuracy is difficult and at some point around 7 to 10 rounds will settle down to consistent usable accuracy. So if the rifle will shoot good groups after being fouled, there is probably nothing wrong with your loads or the rifle, It is just a characteristic of the barrel. Just my opinion based on my experiences with the same problem. J E CUSTOM [/QUOTE]
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Cold Fouled Barrel POI
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