Just FYI.  Finally got to the range yesterday to chrono (already reported) and have some fun trying out Paul’s speed loaders.  Never got to the speed loaders.  I ran into a major feeding/jam problem while attempting to charge a round from the magazine box.  The rounds would wedge tight when entering the barrel. 

I contacted Chuck Moline (aka Chuck n Denver) about the problem.  Note this rifle was just rebarrelled.  He suspected a bent hinge pin rod or interference of sorts as the cartridge is being lifted toward the breach, e.g., rust, metal burr, etc. 
The rod did have a slight bend.  I straighten and polished.  Also I polished the travel area of the cartridge in the magazine area.  No luck, still the same problem.

I redirected my attention to the breach of the new barrel.  The edge was very sharp.  Using a Dremel tool, I polished off the sharp edge.  Problem solved.
Vic

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