When I bought my first double it came with three sets of barrels a 7x65R, 9.3x74R and a 470. The first to draw blood and see the most use is the 7x65R it has a few whitetail and a Fallow Buck easy to carry and a pleasure to shoot. Next the 9.3x74R saw an Aoudad and a couple of whitetail also nice to shoot and a little heavier to carry around. Last the 470 has seen a few boar, it might see more use when I finally make it to Africa but for the most part it's heavy as hell and really useless here in the states except shooting pigs for practice.