When I first bought my 4506 new years ago..it had a very narrow feed ramp that would not feed anything but hardball! It would jam on SWC's and JHP's all the time. I sent it to Wayne Novak and he reshaped the feed ramp and it will feed empty cases from the mag now. If you have the same narrow feed ramp I had it will never be reliable with a good cast SWC's without modification..
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