This doesn't solve your problem, but I had a 280 xtr featherweight that would not feed the second shell in the magazine. The first shot went boom and the second round fed and extracted fine. The third one or second in the magazine would not go into the barrel. Every time.

"You cannot invade mainland America. There would be a rifle behind every blade of grass"
~Admiral Yamamoto~

When the people fear their government, there is tyranny; when the government fears the people, there is liberty. ~Thomas Jefferson~