Large rifle primers are usuall prefered in large volume cases. They can be used in more what I will call normal size cases, but you will need to drop you load by at least 5% and work up again to be safe and you will not use quite as much powder unless you load was under max. Accuracy may also suffer with mag. primers, but not always. With small cases mag. primers can blow the bullet out of the case befor it ignites the powder which can be dangerious and will always give you inaccurate loads.
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Catfish
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