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Old 12-17-2010, 05:40 PM
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alde alde is offline
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Location: Western WA
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I have been working through similar issues with my 4516-1 which is very similar to your 457. I think I have narrowed the problem down to a rough chamber, hood and feed ramp. I have polished it and it seems to have fixed the problem. Here is a picture of what my chamber looked like. There was also a good size burr on the hood.
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File Type: jpg barrel_hood[1].jpg (47.6 KB, 324 views)
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