ATF APPROVED!!! 4/29/05
The 550 Express was designed to be the most powerful round one could legitimately fit into a
sporting/hunting Mauser. It is designed to throw a 700gr bullets 2124fps, and exceed 7000 ft-lbs. It does
this and more, and has tolerable recoil. In short, it beats the 577 Nitro!!
550 Express Movies