I ran into the same thing with 357 magnum loads. The Lee manual doesn’t put the primer used in the load data table. The cartridge illustration at the beginning of the section specified small rifle primer for 223. It specified small pistol primer for 357 mag, but most recipes specified Small Pistol Magnum primers. I emailed Lee about the difference, and my assumption that their recipes spec’s small pistol primer rather than small pistol magnum. The reply I got was, “Your assumption is correct! Our recipes are with Small Pistol primers.”
Does the Hornady manual spec Small Rifle Magnum primers?
