FWIW, I read a Skeeter Skelton article many years back wherein he was talking about using non magnum primers for magnum cartridges.

In the article he outlined the more consistent burn and lower pressure when using non magnum primers.

I took his advice and tried it and never looked back, this was over 20 years ago.

I exclusively use W296/H110, so not to throw a wrench in the works, non magnum primers reliably ignite W296/H110 in magnum loads. I haven't had a squib yet.

44mag and 357mag BTW.

Big no-no with W296/H110 is reduced charges and IMO this is what leads to squibs, not the primers.

No unburned powder and very accurate rounds.