2 mm (0.079") will be the standard size. The paper included holes down to 1.2 mm (0.047"), but a lot of the small flash holes I've run into are about 1.5 mm (0.059") or 1.6 mm (0.063"). Be fun to see a same-gun, same-powders comparison across the range. If the small ones don't pan out for you, they can always be drilled out to a larger size afterward.
Hornady brass without flash holes
- Thread starter tangolima
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