The NBRSA made a change to the Sporter class a few years ago doing away with the forend width and barrel contour restrictions as well as the slope to the butt of the stock. You can build pretty well what you want for the class as long as the rifle weighs 10.5 pounds or less and doesn't have a concave forend. I'm not sure how long its been that way, but have seen very little in the way of anything different actually being shot in the class. With the length of time it takes to get actions as well as have stocks made or make stocks, it does take a little bit of planning and time to try something different. Bob Scarborough is making a stock thats called the hammer head that has a 5" wide forend. Scott Hunter has shot his some, but don't know whether he's competed with it.