Quote:
Originally Posted by Pathfinder76
Has anyone found that uniforming primer pockets and deburring flash holes makes a difference on target?
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I’m not sure what it means to uniform a primer pocket. I’ve got that little de burring tool that fits into the primer pocket and I use it to clean out the carbon from the primer pocket.
But as far as deburring the flash hole, yes that makes a difference, again, especially so in cheap brass. I’ve seen flash holes that were mostly covered by a piece of brass that stayed there after punching the flash hole. Imagine how the flame would appear trying to blow past that? You’d have poor and uneven ignition of your gunpowder. Some cases would blow the primer charge to one side. You’ll get even ignition with even flash holes. Similar to trying to light a piece of paper with a piece of metal randomly blocking different amounts of your flame from your lighter, as an analogy. You’ll get different pressures with everything else being equal, which causes different points of impact.