I am wanting something w/long bbl life, no recoil and 1000 yd performance. Kirby has my rifle and a 5C Broughton 6mm bbl w/an 8 twist. I have laid to rest my dream of a 6BR due to my inability to find ANY Lapua brass in the lower 48 states and the fact that Kirby does not have a reamer.
Now what? Kirby has a 6-250 reamer and pretty much has me talked into that, but now I'm not sure. I'll have to buy dies and they don't give those darn things away ($200). I am also concerned about the case life on this round. How many firings can I expect and will case growth be excessive?
The way I see it, I only have two other options. Go w/the .243 win or the .243 AI. I have a Lee collet die for the .243 win and would only purchase a body die to bump the shoulder back w/out touching the neck. I would get near identical performance as the 6-250 but would be burning more powder. Would this greatly shorten my bbl life?
The AI is attractive to me b/c of the shoulder angle and it's lack of growth not the performance gains. I wouldn't have to trim it very often and would probably only load it to around 3000 fps w/the 105 Amax. There is no need to burn all that powder and toast the throat that much faster. Can I use my standard .243 collet die on the AI? I don't really like the idea of fireforming either as this will use up some bbl life.
I havent shot a 243 at 1000 yards yet but I would imagine they would be able to with the right bullet. As for barrel life I would expect it to be long. I know people who shoot them and have put closing in on 2-2.5k rounds through them and they still shoot less than 1/2moa. I dont know if this is abnormal for this cartridge but I wouldn't shy away from a 243 or 243AI. Just my expierence.
I dont know who ever came up with the imaganary word of "Over Gunned"
If youre thinking about the 6-250, your 243 collet die will work, or you could have Kirby hold a standard 243 reamer short, and have a machinist chop off the needed amount and use any 243 die for FL sizing, or bumping the shoulder.
Main advantage is cheap, and readily avalable dies. You can have the factory dies bought, and cut down for much less than a set of custom dies. Basically duplicates 243 performance, with 6 grains less powder... same as the 6-250