The best replacement for magnum primers is standard primers.

The best alternatives to magnum primers are rated as following:
★★★★★  standard primers
★★★★  small rifle
★★★★  regular primers
★★★  large rifle primers
★★  small pistol primers
★  large pistol primers
  small rifle primers

Your alternative for magnum primers is not listed? Suggest!
Speaking about magnum primers, one probably shouldn't forget about 2400.

Other search terms related to magnum primers and their ratings are:
★★★★★ 2400
★★ trail boss
★ h110
You have in mind a companion for magnum primers and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of magnum primers in all years. Click on graph for more.
magnum primers
standard primers
small rifle