29 January 2021, 03:31
Tennessee Bank WalkerS & B 45 ACP small primer hole
A friend ask for help reloading this brass. I discovered that the ID of the primer hole is 0.200 and the OD of CCCI 500 and Federal 100 primers is 0.190. That is 10 thousands difference. Is there a primer to fit the S & B 0.200 hole?
29 January 2021, 05:07
Jgrabow6493Looks like a job for someone with a primer pocket reamer.
29 January 2021, 06:27
Tennessee Bank WalkerThe primer pocket is .010 greater than the primer.
29 January 2021, 07:01
Jgrabow6493Primer pocket dimensions and tolerances:
Small Pistol: Diameter Min = 0.1730, Diameter Max = 0.1745
Large Pistol: Diameter Min = 0.2085, Diameter Max = 0.2100
I measured a small rifle primer, they are the same size as the small pistol primers, and it measured 0.175. If the primer pocket is already @ 0.200 then you have to ream out the pockets to large pistol size and use large pistol primers.
What are you using to measure the primers and primer pockets?
29 January 2021, 07:14
Lamarsomething changed, S&B used to have uuber tight primer pockets.
is the flash hole oversized by chance?
29 January 2021, 18:59
richjIn my experience... S&B primer pockets were always SMALL and their brand primers were always oversized. I throw S&B 45acp cases away and I don't use S&B primer in the progressive press.
Your findings are opposite of what I've seen over the years. I'm going to mic the S&B primers that i have now.
29 January 2021, 22:43
Tennessee Bank Walkeryes it is over sized(0.200). I am measuring with a very good set of Vernier calipers. I am a machinist, know how to measure a primer pocket.
29 January 2021, 23:26
Jgrabow6493It sounds like you have under sized large pistol primer pockets.
30 January 2021, 05:41
Tennessee Bank WalkerThese primer pockets are nowhere near a large primer ID.
30 January 2021, 21:51
Tennessee Bank WalkerI tried a W-W non toxic case with small primer pocket with Federal 100 small pistol primer which fits perfectly, therefore the Selliotte and Boleh cases must have had a crimped small pistol primer that came off with primer when we de-capped the primers.
Please excuse my spelling of S & B.