The Remington Mod. 241 Speedmaster I recently bought typically feeds the first seven rounds of a 10 shot string flawlessly, but won't feed the last three. I thought that a good cleaning would help--the gun was so dirty I doubt that it was EVER cleaned--but no dice. It still won't feed those last three rounds. Weak magazine spring? I thought I'd better run this though the forum before buying any parts. Thanks, Pete