My wife was nice enough to stop at the local scheels and pick up some primers on the way home. Unfortunately they only had magnum primers left in the large rifle variety. I have never used magnum primers. I only reload for 223, 243, 280 & 308. I still have several hundred regular large rifle primers left so I am not in dire need. None of the reloading manuals I have show use of the magnum primers. Any ideas on what to do. I would be open to trade or return but the scheesls doesn't have any of the large rifle primers in stock to exchange for. Should I just sit on the magnum primers? Use them and start load development all over again? Thanks for any suggestions.