fireforming

[skb2706]

Lube your 25-06 brass and run them into your 6mm-06 size die, go a little at a time, just to the point of chambering in your 6mm -06 rifle. Check case length the confirm it is proper length. ...trim if needed.
I would then find some cheap 'heavy for caliber bullets'...maybe some 100 gr. RN and faster powders and use starting loads. Several other methods will work. Thats just the way I do it.

There is a very good chance that going from 25-06 to 6mm-06 that just sizing and loading up normal will get you very accurate loads at that point.