primer dimension standards; synchronicity or just engineers reusing the same drill bits way to often

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waptek
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primer outer (or inner ) descending diameter order compared to a 22 LR
rimfire cartridge = .3125 .210 .209 .175 vs .223 bullet, .226 base, .278 rim


.209 primer dimensions (done like Wikipedia cartridge notation)
.236 - .245 shoulder diameter
.240 -