Fireball2: Dang that is disappointing!
I couldn't even suggest a cure.
But I hope someone more knowledgeable than I can help you out.
The double loading magazine and the non-existent feed ramp tells me this design wasn't "mocked up" for testing - just put together.
It shoots so very well that maybe you could get along single loading ("putting up" somehow with the problems you posted)?
How about round nosed bullets if you can find some for your handloading?
I am just sad for your situation but hopeful for a good outcome.
Thanks for sharing your porblems with us.
Hold into the wind
VarmintGuy