Shmella Posted October 22, 2015 Share Posted October 22, 2015 One thing I have noticed is very flat primers on my revolver loads. Loading 9mm for a 929 minor PF. Ive loaded with WST and used 124, 115, 147, and in the revo the primers are really flat. I don't recall these loads having flat primers out of my auto's. Is this a common thing in a revolver with federal primers? Im new to the wheel world Link to comment Share on other sites More sharing options...
Toolguy Posted October 22, 2015 Share Posted October 22, 2015 The newer Smith revolvers have a firing pin bushing with a slight crown to it. I speculate that the reason for this is to make sure the primer is below flush after firing to allow the fired case to rotate around easier. Sometimes on hotter loads there can be a little volcano on the primer that formed around the firing pin during firing. Link to comment Share on other sites More sharing options...
Bill H Posted October 22, 2015 Share Posted October 22, 2015 Mine are the same way with 160s and N320 Link to comment Share on other sites More sharing options...
Seancass Posted October 22, 2015 Share Posted October 22, 2015 Im also getting extremely flat primers with loads from minor clear down to 105-ish PF. Powders include Silhouette, Longshot, and tight group. I just accepted it as normal and not a sign of pressure. Link to comment Share on other sites More sharing options...
NoSteel Posted October 23, 2015 Share Posted October 23, 2015 Me also. Just over minor PF w/ 147RN Blue Bullets and N320. Guess I know the reason now....... Link to comment Share on other sites More sharing options...
Shmella Posted October 25, 2015 Author Share Posted October 25, 2015 I could be dumb but what is the reason? Link to comment Share on other sites More sharing options...
peterthefish Posted October 25, 2015 Share Posted October 25, 2015 Federal primers - the primer cup is softer and the firing pin bushing is slightly convex. Link to comment Share on other sites More sharing options...
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