@Longwalker I would be fine using the DGX Bonded bullet in a 450/400. I think this argument is down to good, better, best, most people agree that the DGX Bonded is not the best expanding DG bullet on the market but with a 90% weight retention its certainly a good DG bullet. Give the fact that your double was regulated for Hornady ammo makes it the best bullet you can use. All of the famous hunters we so often quote on this site never had a NP let alone a bonded bullet, they used cup & core or solids for their storied exploits. The only modern hunter I know who has a similar number of safaris to the legends is Craig Boddington and he uses Hornady ammo and never had an issue with the original DGX bullet.