You should be ok. Everything ive read about mag primers in regular loads says you should reduce by 10% and work back up looking for pressure signs.
The magnum primer will be higher pressure than a standard but if you start low and work up it won't be an issue. Just remember if you swap back to a standard primer later to start the load workup again. What was an accurate load might not be anymore
Thank you guys.You're fine running what you got, especially if you're going just over minimum.