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Old 09-14-2021, 02:10 PM
stansdds stansdds is online now
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I've never used magnum primers in my 357 loads using fast or medium burning powders. I have heard that magnum primers may have a small benefit in terms of igniting fast powders in the longer cartridge, but they are not required. For slow powders like AA#9, HS-6, H-110/W-296, magnum primers are a must.
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