Large pistol pocket = 0.1170 min height, 0.1230 max, diameter min 0.2085 and max 0.2100

Large pistol primer dimensions - 0.1150 min height, 0.1250 height, .2100 diameter min, .2120 diameter max


Brownell/Sinclair pocket reamer ,both large and small, chucked in B&D electric screwdriver easy way to go. Not terrible expensive either .

I use on both new brass and reloads. Squares up pocket and sets proper depth.

I have come across some imported primers the last few years that were too large to fit. I try to stick with CCI and Winchester, Federal as well.
Check your priming tool for wear as well.

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