Not for me. The last 4-5 XMPs I've had were good triggers, a simple adjustment took all of them to 32-40oz for a very crisp break. You hear enough on the web to realize there must be plenty of duds, but I just havent ran into one on my latest crop of 700s. As far as hunting rigs go, I really don't prefer my custom triggers to the XMP when adjusted properly(even including Jewel). Different strokes for different folks....
