Interesting. My Lyman reloading says either 300 or 350 primers may be used.
Primers............................... CCI 300 & 350 Primer Size................. Large Pistol, Std. & Magnum
Griffin, Thomas. Lyman 50th Edition Reloading Handbook (p. 439). Kindle Edition.
Primers............................... CCI 300 & 350 Primer Size................. Large Pistol, Std. & Magnum
Griffin, Thomas. Lyman 50th Edition Reloading Handbook (p. 439). Kindle Edition.