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Thank you all so much. Some great questions. New powder. Have used it for 15 years in AR's. Don't crimp. Not compressed load. Barrel is on its last legs. Still shoots 1/2 inch with 55 berger and 25 gr h335. I measured about 0.035 of throat erosion so I thought I'd try some longer bullets thus the 69 ers. I seated them very long but not in the lands. I cycled 10 by hand out of a mag with no issues to check for land clearance. When I shoot I shoot single shot and drop the bolt from half way and check bolt position to assure in battery condition. I do this because I have found setbacks when a jam happens. My neck tension is from .247 empty to .250 loaded with Lapua match brass shot 2 or 3 times max. So in single shot my loads don't bounce off the feed ramps. CCI br primers. Sorry but some questions just came to mind. I don't see a setback. But how else do you explain a ripped up Sierra at 3100 fps? Thanks again for all your great questions. I hope I answered all of them.

<blockquote data-quote="bakerboy" data-source="post: 2944516" data-attributes="member: 8953"><p>Thank you all so much. Some great questions. New powder. Have used it for 15 years in AR's. Don't crimp. Not compressed load. Barrel is on its last legs. Still shoots 1/2 inch with 55 berger and 25 gr h335. I measured about 0.035 of throat erosion so I thought I'd try some longer bullets thus the 69 ers. I seated them very long but not in the lands. I cycled 10 by hand out of a mag with no issues to check for land clearance. When I shoot I shoot single shot and drop the bolt from half way and check bolt position to assure in battery condition. I do this because I have found setbacks when a jam happens. My neck tension is from .247 empty to .250 loaded with Lapua match brass shot 2 or 3 times max. So in single shot my loads don't bounce off the feed ramps. CCI br primers. Sorry but some questions just came to mind. I don't see a setback. But how else do you explain a ripped up Sierra at 3100 fps? Thanks again for all your great questions. I hope I answered all of them.</p></blockquote><p></p>

[QUOTE="bakerboy, post: 2944516, member: 8953"] Thank you all so much. Some great questions. New powder. Have used it for 15 years in AR's. Don't crimp. Not compressed load. Barrel is on its last legs. Still shoots 1/2 inch with 55 berger and 25 gr h335. I measured about 0.035 of throat erosion so I thought I'd try some longer bullets thus the 69 ers. I seated them very long but not in the lands. I cycled 10 by hand out of a mag with no issues to check for land clearance. When I shoot I shoot single shot and drop the bolt from half way and check bolt position to assure in battery condition. I do this because I have found setbacks when a jam happens. My neck tension is from .247 empty to .250 loaded with Lapua match brass shot 2 or 3 times max. So in single shot my loads don't bounce off the feed ramps. CCI br primers. Sorry but some questions just came to mind. I don't see a setback. But how else do you explain a ripped up Sierra at 3100 fps? Thanks again for all your great questions. I hope I answered all of them. [/QUOTE]

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