I would feel safe sending any of my Weatherby Mark V rifles back to the factory . I have been loading for the .270 Weatherby Mag again. I do not seem to have any issues with the belt. I have collected New Unfired Brass over the past 30 years , and just bought 50 once fired Weatherby cases and another 50 Rds of new Norma 270 Weatherby Mag Brass. All separated by weight of 1 grn. so I have cases in the 206 grn. range; the 207 grn. range ; the 208grn range , ect. Took about 85 rounds of my handloads to the Bang Steel Shooting School , where they performed really well at assorted Ranges out to 1200yards. all with the same load, 66.7 grns of H 4831 SC ,with the 150 grn Nosler Accubond L R bullet . I will be testing 67.0 Grns. of H 4831SC in the spring . I don't expect much difference. This Rifle /Bullet / Load will be used in North Carolina for deer , in the Bean fields, where a 400 to 500 yard shot at a whitetail, is very possible.