Browning Gold Problem

[tjwatty]

My son is shooting a Browning Gold, gun works just fine except with 3.5 shells. They seem to hang up when the second shell is cycling into the chamber. It ejects them fine but the next load catches on entry to the chamber. It handles 3" and 2 3/4 just fine and it doesn't seem to make a difference who's shells he uses, it doesn't do it all the time, just at the most in opportune times. A trip to our local smith today didn't reveal any glaring problems and cleaning doesn't appear to be an issue. I told him if he had just bought the Bennelli,,,, and then he uses bad words at his Daddy. I think I'll just tell his Momma...
Seriously, anyone had any similar trouble???