I have a 1962 tube fed (2nd year production).

If he didn't take the lifter assembly completely apart, it may still be causing issues. When I got mine, the bolt would not even close when you pulled the bolt back on the first round. I tried the general trick of soaking the whole unit in solvent/cleaner, and using compressed air to blow it out, but it did not fix the problem.

I've gotten to where I can take the entire trigger assembly apart pretty easily without mishap. I wouldn't recommend it if you are not comfortable doing so as there is more than one part in there that can sproing out in to oblivion.

If you like, you can take it back, and ask that your smith pay special attention to the chamber with a 45cal brush wrapped in solvent and steel wool. Even being 2nd year, my rifle has a hole in the back of the receiver that you can pass a cleaning rod through to chamber clean instead of muzzle clean If that doesn't help, you can mail me the trigger assembly and I'll break it down and clean it thoroughly.

Here's mine. Serial number 4,78x

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