Well, that's not what I wanted to hear Mark.
But it does seem that 105 gr might be pushing it for this fairly slow twist.
Maybe I'll try some 95 gr VLD. I have some RE 19 that my WSM didn't seem to like, maybe I'll see how the 243 likes it before buying more powder. Seems like there is no real go to powder for this cartridge, lots of opinions, which hopefully means they all shoot fairly well.
Are full length sizing dies of much use for this round? Going to order my dies and brass and get started but I'd prefer to only buy what I need.