I've used magnum primers a lot in non mag cartridges. I see no downside whatsoever. In fact in my 30/06 180 grain Ramshot Hunter load a mag primer cut groups in half and ES numbers went from a spread of about 70 fps down to 6 fps. For the most part however accuracy has been very similar in switching between mag or non mag primers. I've noted about 25 to 30 fps gain in velocity useing a mag primer in 06 size case. The velocity gain is free considering a mag primer cost the same as a non mag primer.
Trystan
Good bullets properly placed always work, but not everyone knows what good bullets are, or can reliably place them in the field
| 
