one thing worth noting, substituting different brands of primers into a load can have different results. some fire off a bit hotter than others. if a load is at or near maximum, it is advisable to reduce the charge a bit and work it back up if switching primer brands. chronographs are a big help here in seeing how much change has occured (if any) with the switch.
If I need more than 1 shot, I need more practice.
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