And someone necked it down to make the 6mm Creedmoor.
IMO, It's an improved 243 using 1:8 twist instead of 1:10 which give the opportunity to load heavier high B.C. bullet that you can load at mag length.
You still have to body size every 3-4 firing I guess.
For me, it mean that every 3-4 firing the reloading method is not the same which will leads to inconsistencies.
I teached at least 10 persons but It's so much time consuming.
I got an opportunity through longrangehunter.ca to put it all on videos that they are selling for cheap and all I have to do now is answer questions on small things people didn't understand in the videos and about new stuff appearing...