[Daniel2013]

I have four Encore's and three Contenders. My older Contender locks up on some barrels. I have been told that this is not an uncommon problem with some Contender's. I also seen on one site that this is a fairly simple fix, but the person didn't elaborate as to what the "simple fix" was. Can any one give me a clue as to what it is? And how to fix it?
Thanks
Danny