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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Barrels, which manufacturer??
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<blockquote data-quote="tim_w" data-source="post: 1345486" data-attributes="member: 11132"><p>I guess those many hundreds of AR barrels never broke in along with the 3 customs precision I have had of my person guns. Its a good thing they all foul far less than broken in barrels not nitrided and clean much easier. Must of gotten lucky ????</p><p></p><p>I actually tested this as opposed to hypothesis. First how is trace copper staying in the barrels when they are preheated way above the melting point of copper? There are places that do crappy nitriding no different than barrel making. That usually end in a surface that is not as hard and even when speaking in microns is a thinner.</p><p></p><p>As for barrel break in. That is a burnishing of the surface or in otherwords a type of polishing hence why when you use a mechanical paste you sort of have to thru something similar to a very shortened break in. Some barrels with very nice surfaces are broken in only a few shots. Nitirding when the process is of the quench polish quench leaves s surface once polished that is far slicker than a broken in barrel not so treated so not sure how that works. The fact there is a increase in vel and lowering of pressure supports this fact. Very much the same happens going from a virgin barrel to broken in but this takes it beyond that degree a step further. Again its not like you are gaining 300 fps and can add 10% more powder but its there and measurable given if there is enough powder capacity in the vase and proper burn powder etc which is a given. </p><p></p><p>Not to mention that when dealing with a barrel burner like many of the popular LR rounds you are not actually burning up the throat while you are breaking in the barrel with shots compared to nitriding. Could you do a nice finally hand lapping of the chamber and bore??? Yes without a doubt and likley a good idea especially the chamber. The smoother the better makes complete sense but a top end barrel should need little in the bore itself.</p><p></p><p>Nothing is a free lunch but what krieger wrote just does not match up with what I know of the process or the logic of it with the understanding of what is going on.</p></blockquote><p></p>
[QUOTE="tim_w, post: 1345486, member: 11132"] I guess those many hundreds of AR barrels never broke in along with the 3 customs precision I have had of my person guns. Its a good thing they all foul far less than broken in barrels not nitrided and clean much easier. Must of gotten lucky ???? I actually tested this as opposed to hypothesis. First how is trace copper staying in the barrels when they are preheated way above the melting point of copper? There are places that do crappy nitriding no different than barrel making. That usually end in a surface that is not as hard and even when speaking in microns is a thinner. As for barrel break in. That is a burnishing of the surface or in otherwords a type of polishing hence why when you use a mechanical paste you sort of have to thru something similar to a very shortened break in. Some barrels with very nice surfaces are broken in only a few shots. Nitirding when the process is of the quench polish quench leaves s surface once polished that is far slicker than a broken in barrel not so treated so not sure how that works. The fact there is a increase in vel and lowering of pressure supports this fact. Very much the same happens going from a virgin barrel to broken in but this takes it beyond that degree a step further. Again its not like you are gaining 300 fps and can add 10% more powder but its there and measurable given if there is enough powder capacity in the vase and proper burn powder etc which is a given. Not to mention that when dealing with a barrel burner like many of the popular LR rounds you are not actually burning up the throat while you are breaking in the barrel with shots compared to nitriding. Could you do a nice finally hand lapping of the chamber and bore??? Yes without a doubt and likley a good idea especially the chamber. The smoother the better makes complete sense but a top end barrel should need little in the bore itself. Nothing is a free lunch but what krieger wrote just does not match up with what I know of the process or the logic of it with the understanding of what is going on. [/QUOTE]
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Barrels, which manufacturer??
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