I've been following the recent 223 cast thread. It is quite helpful since I'm about ready to start loading it myself. I'm using the 55 grain Lyman 225415. I have 2400, RX7, and H110 on hand to try loads with.
But, there appears to be a mix on which primers. The Lee manual simply states its loads with "Small Rifle Primers" but the Lyman Cast Bullet Book specifies "Small Rifle Magnum".
Which would be best to start with? (I have both available). My Chrony is broken so I won't be able to measure velocity.
I will be starting with a T/C Contender Carbine barrel.
Thanks
Daryl