Primer "hole" size? - Page 2

flashhole · February 20, 2018, 01:28 PM

OK thanks

**Unclenick** · February 20, 2018, 05:24 PM

Note that very large (1/8") primer flash holes (aka, vents; see SAAMI glossary) usually exist because the very high brisance of the DDNP sensitizer in non-toxic primers would back the primer out of the pocket so hard it would leak or pierce. You still find those cases, but usually, they are small primer pocket in 45 Auto now, and the old large primer pocket NT primed cases have disappeared. The small ones work with a 0.080" flash hole, and that's why a lot of small primer pocket 45 Auto is around now.

February 20, 2018, 01:28 PM	#26
flashhole Senior Member Join Date: February 9, 2005 Location: Owego, NY Posts: 2,000	OK thanks __________________ ,,, stupidity comes to some people very easily. 8/22/2017 my wife in a discussion about Liberals. Are you ready for civil war?

February 20, 2018, 05:24 PM	#27
Unclenick Staff Join Date: March 4, 2005 Location: Ohio Posts: 21,061	Note that very large (1/8") primer flash holes (aka, vents; see SAAMI glossary) usually exist because the very high brisance of the DDNP sensitizer in non-toxic primers would back the primer out of the pocket so hard it would leak or pierce. You still find those cases, but usually, they are small primer pocket in 45 Auto now, and the old large primer pocket NT primed cases have disappeared. The small ones work with a 0.080" flash hole, and that's why a lot of small primer pocket 45 Auto is around now. __________________ Gunsite Orange Hat Family Member CMP Certified GSM Master Instructor NRA Certified Rifle Instructor NRA Benefactor Member and Golden Eagle