I've seen zero difference to 50fps between an rum and edge in an average build, if you go single shot and throat the edge out over 4.0 inches then you can start getting more out of it.
Ok thanks for the info I am looking for this kind of response to see if it is worth it for the slight gain. I may buy a new broughton barrel down the road then I definitely would do it. I would like a 28-30 barrel WO brake for the slight gain in velocity. What's your opinion on the make and contour for the lightest most accurate hunting barrel?