I second this! I also have a 243 that I am going to home feed. Mine will get 100 grain Sierra Gamechangers.
It's 1 : 9.25You'll want to try the 90gr Sierra TGK unless your 243 has a 1:8 or faster twist rate
More 4831 and don’t load them so long. Same advice I gave you over text last weekJust acquired this thing and looking for any in-site on what works well for hand loads I have a box of 90gr Speer hot cores I’d like to get a rough idea what powder and charge it likes to work off of instead of trying at 8 powders I have for it… thanks!