Mauser - not sure about that - moving the bullet forward in a .458, along with the powder charge, to where the bullet lodges in the throat while ignition pauses, might be a chore for a primer - any primer.

This does happen in the .22 Hornet, though, and is why a lot of Hornet's give better accuracy with pistol primers. The 'softer' impluse is more prone to leave the bulelt in the case. With Hornet's, it isn't a case of poor igntion, it's a case of the primer being too violent for the thin case's hold on the bullet, and the lightweight charge not being enough to absorb the impact of the primer's ignition. In the Hornet, we reduced SD's to the teens, and improved accuracy 3 fold, just by using the Lee Crimp die. My CZ Hornet is now among the most accurate rifle's I've shot - frequently turning in 1/4", 5 shot groups at 100 meters. the pimers and priming did the trick. With the .458's I've used, a CCI250, Rem 9 1/2 Mag or Fed 215 primers have all given good results with jacketed and cast - along with crimping. the stronger powders are needed with the slower powders, not so with pistol or shotgun powders and may be detrimental with the fast, easy to ignite powders.

With the big straight and lightly necked cases, there is a lot of room & if not filled when using hard to ignite powders, the primer's force can push the powder to the front of the case, packing it against the bullet, where it sits until the ignition manifests itself, thus the hangfire. I seriously doubt the primer can move a heavy bullet from it's seat in the front of the case.