Can I use different primers without any problems?

All primers are suitable for the intended purpose, but you should not use different types of primers. If you use another primer, the firing point may change. The difference can be 10 m/s, depending on the primer, with the pressure also changing accordingly. The primers are likely to have some effect on the barrel vibrations and with that on the precision and target location.

Introduction To Norma-USA:

Norma Oryx:

Norma Kalahari: