Thread: Wildcat/brassforming/fun project question

I like the look of the 6br as a varmint round. But why not save the hassle on a fully fledged build and just get a 243. But then I'd like less capacity than the 243.
So just for interests sake. Could you just get a 243, set the barrel back 2-300 thou say without rechambering and then turn 2-300 thou off the bottom of the FL die. Obviously would need to neck turn, trim and anneal but I thought it could be a fun project. You could seat the long projectiles out a mile and you'd be burning less powder. My question is , would the taper of the brass be an issue or is it feasible?