You can use them for any case that needs a large rifle primer. You just need to start low with the powder and work your way up watching for pressure signs. About all ball powders recommend using Mag primers.
Keep in mind the animals we shoot for food and display are not bullet proof. Contrary to popular belief, they bleed and die just like they did a hundred years ago. Being competent with a given rifle is far more important than impressive ballistics and poor shootability. High velocity misses never put a steak in the freezer.
Kinda what I thought I loaded some 243 with some retumbo and noticed I started seeing some psi signs quickly at like 44grns well below book so I was also wondering my velocity with that since I don't have a Chrony