Thread: 100g hornady in .243

Eh, do a ladder test. 10-15 rounds worth of compnents and you'"l have a load good to go.

17 is a pretty short barrel to get all of that powder burned, I would say you're going to gain some drop!
I've never loaded 243 but it looks like a short powder column necked a calbre and a half down. So if the chance presents itself maybe pick up some slower powder. RL19 and 4831 come up in my manuals, but I have a suspicion RL22 could do even nicer.