Sorry to hear your experience isn't going great. I guess I've been fortunate, I'm at 50ish grains H1000 with the 108's at 3100 no pressure signs at all, even at 90 degrees. I went fairly cheap on the dies and got the Lee 243 collet die and a Redding type S with the button removed. So far everything has been good. I do have to clean this gun fairly regular or I get carbon ring. Have you looked inside with a bore scope yet?
Aside from the dies and all that there is no denying, imho, that fire forming brass sucks in general and worse yet if its on a barrel with a shorter lifespan. Someone will chime in "practice" for the fire forming, yeah yeah, still annoying. Being able to just buy 6cm brass from a good supplier is what keeps repeating in my head each time I wonder about 243AI.
If starting from from scratch, sure the 6CM wins. I wasn't, therefore the 243 AI won. What is it that actually sucks about fire forming? Losing a piece of fire formed brass does suck, aside from that what?
I have a 280AI and got it when nosler was the only one making brass so I made my own which was my fireforming experience background. Issues I had was it burned up components and barrel life on a temporary load. Yes you can dial in a load and practice with it but its not nearly as efficient. My major gripe just has to do with the fact I can't readily shoot without travel/time involved and if you need more brass on short notice that can suck. I made a mistake with a new lot of powder in some softer brass and lost all my primer pockets on that batch of brass while hunting, I didn't realize it till I went to load more rounds for another hunt and had to do an emergency trip to just form more brass. Yes that was my error and poor planning. It just isn't something one has to deal with if there is good formed brass already available.
