 By comparison, while bolt-action shotguns may only use a single locking lug, almost all bolt-action rifles use multiple locking lugs around the perimeter of the bolt to provide an even distribution of the forces of firing, providing a much higher intrinsic strength.Since many break action rifles, such as the inexpensive H&R models, are built on large frames originally meant for shotguns, the action is very heavily built and capable of handling moderate to high pressures.Still, belted magnum cartridges such as .300 Winchester Magnum are generally only found in the highest-quality break action rifles.