Testing Regular vs. Magnum Rifle Primers

For years the Redneck Preppy has been told that magnum rifle primers have more heat than regular rifle primers and you need to cut your powder loads if you want to substitute them. Is that actually the case? The Preppy conducts a completely unscientific test to find out.

Large Rifle Primer Performance by Laurie Holland - https://www.targetshooter.co.uk/?p=1471
Learn How to Read Pressure Signs on Your Reloaded Ammunition - https://www.youtube.com/watch?v=vHD7hr_gPeQ

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