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Rifles, Reloading, Optics, Equipment
Reloading
6.5 GAP 4S Pressure Issues
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<blockquote data-quote="jraulsten" data-source="post: 1400112" data-attributes="member: 96652"><p>I have an issue with a gun that I have never seen in all my years of shooting and I'm hoping someone out there can shed some light on what is happening!</p><p></p><p>Recently had a custom 6.5 GAP built with Brux 1:8 barrel and Surgeon action. This gun is a tack driver, but every time I clean the gun my first few shots from a cold bore show signs of excessive pressure (pronounced ejector marks and slightly flattened primers). This happens even with a mild load (58.8 grains H1000). After 3-4 shots pressure signs disappear and I can shoot up to 61 grains with no ejector mark. I still get slightly flattened primers but that may be due to a relatively soft primer? I'm currently loading H1000 with Hornady brass, 215M primers and Berger 140 Elite Hunters. I at first thought I had left something in the bore from cleaning such as lint off a patch or not thoroughly removing all cleaning agents but I am very anal with my cleaning regimen. I bore scope the barrel each time to ensure everything is free of obstruction but the problem persists, even after 200 rounds through the barrel. I am totally frustrated......Is fouling resolving the issue? I can let the barrel cool to ambient temperature and have no problems as long as the barrel is not clean. I'm about to give up and shoot a slow load of 58.8. This mild load shoots in the .2s pretty consistently and only shows a light ejector mark the first few rounds. I started with 59.5 the other day and the bolt was sticky and I had very pronounced ejector marks you can catch a nail on. Again, there were no problems after the first few shots. I don't know whether to just settle for a slow 6.5 GAP or never clean the **** thing again!</p><p></p><p>I sincerely appreciate any help I can get on the subject. Trim length of the brass is fine, etc., etc. I have run out of things to look for....</p></blockquote><p></p>
[QUOTE="jraulsten, post: 1400112, member: 96652"] I have an issue with a gun that I have never seen in all my years of shooting and I'm hoping someone out there can shed some light on what is happening! Recently had a custom 6.5 GAP built with Brux 1:8 barrel and Surgeon action. This gun is a tack driver, but every time I clean the gun my first few shots from a cold bore show signs of excessive pressure (pronounced ejector marks and slightly flattened primers). This happens even with a mild load (58.8 grains H1000). After 3-4 shots pressure signs disappear and I can shoot up to 61 grains with no ejector mark. I still get slightly flattened primers but that may be due to a relatively soft primer? I'm currently loading H1000 with Hornady brass, 215M primers and Berger 140 Elite Hunters. I at first thought I had left something in the bore from cleaning such as lint off a patch or not thoroughly removing all cleaning agents but I am very anal with my cleaning regimen. I bore scope the barrel each time to ensure everything is free of obstruction but the problem persists, even after 200 rounds through the barrel. I am totally frustrated......Is fouling resolving the issue? I can let the barrel cool to ambient temperature and have no problems as long as the barrel is not clean. I'm about to give up and shoot a slow load of 58.8. This mild load shoots in the .2s pretty consistently and only shows a light ejector mark the first few rounds. I started with 59.5 the other day and the bolt was sticky and I had very pronounced ejector marks you can catch a nail on. Again, there were no problems after the first few shots. I don't know whether to just settle for a slow 6.5 GAP or never clean the **** thing again! I sincerely appreciate any help I can get on the subject. Trim length of the brass is fine, etc., etc. I have run out of things to look for.... [/QUOTE]
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6.5 GAP 4S Pressure Issues
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