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Long Range Hunting & Shooting
sudden velocity increase mystery
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<blockquote data-quote="elkaholic" data-source="post: 395948" data-attributes="member: 13833"><p>That is an interesting developement! I am assuming that you clean the barrel and don't have a serious fouling problem? I have heard of carbon building in the throat even when the rest of the bore is clean. A buildup in that area can definitely affect pressure. I would try putting a saturated patch of kroil or hoppes in the throat area and leaving it there for a day or two. Remove the patch and insert another patch wrapped around a bore brush, rotate several times and see what comes out? If you see a lot of black, continue the process until it is clean and try your load again.You don't sound like a greenhorn so you have probably checked this as well but over length case necks can also cause this problem. Another possibility could be a too thick case neck which would not allow enough clearance when firing. Usually you will notice difficult chambering when the condition reaches that stage. Good luck and keep us posted........Rich</p></blockquote><p></p>
[QUOTE="elkaholic, post: 395948, member: 13833"] That is an interesting developement! I am assuming that you clean the barrel and don't have a serious fouling problem? I have heard of carbon building in the throat even when the rest of the bore is clean. A buildup in that area can definitely affect pressure. I would try putting a saturated patch of kroil or hoppes in the throat area and leaving it there for a day or two. Remove the patch and insert another patch wrapped around a bore brush, rotate several times and see what comes out? If you see a lot of black, continue the process until it is clean and try your load again.You don't sound like a greenhorn so you have probably checked this as well but over length case necks can also cause this problem. Another possibility could be a too thick case neck which would not allow enough clearance when firing. Usually you will notice difficult chambering when the condition reaches that stage. Good luck and keep us posted........Rich [/QUOTE]
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