It is mostly not advisable to interchange magnum primers with typical primers without the need of very careful thing to consider of the load technical specs. Magnum primers offer a hotter and more time-length flame to ignite powder in large or greatly loaded cartridges much more properly. – American Reloading https://emilianourmic.tokka-blog.com/31200232/large-rifle-primers-winchester-no-further-a-mystery