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**Unclenick** · December 17, 2018, 11:22 AM

Yep. Stick powders like Varget don't have the super heavy deterrent coating of a spherical powder, so they don't require a magnum primer to ignite. But if your data was developed with a magnum primer, then you can see some performance difference if you don't use one.

For AR's and other semi-autos, there are military sensitivity primers to reduce the chance of getting a slamfire (though they aren't common in the Armalite mechanism). The CCI #41 is the magnum version of a military sensitivity primer. The Federal GM205MAR is a standard primer with military sensitivity.

December 17, 2018, 11:22 AM	#3
Unclenick Staff Join Date: March 4, 2005 Location: Ohio Posts: 21,063	Yep. Stick powders like Varget don't have the super heavy deterrent coating of a spherical powder, so they don't require a magnum primer to ignite. But if your data was developed with a magnum primer, then you can see some performance difference if you don't use one. For AR's and other semi-autos, there are military sensitivity primers to reduce the chance of getting a slamfire (though they aren't common in the Armalite mechanism). The CCI #41 is the magnum version of a military sensitivity primer. The Federal GM205MAR is a standard primer with military sensitivity. __________________ Gunsite Orange Hat Family Member CMP Certified GSM Master Instructor NRA Certified Rifle Instructor NRA Benefactor Member and Golden Eagle