My Neighbor had a custom rifle made, no brass to be had. I took std Rem 22/250 brass and using a Redding long tapered expander necked it up to 6.5. Using bulls eye and cream of wheat, I fire formed the brass in my shop.
First trip to the range, he was shooting the 130g Bergers in 1/2" groups at 200 yards. All my neighbor does is target shoot, he finally got the Lapua brass, and cant tell the difference in groups between the Rem 22/250 brass and the Lapua brass.
This helps me on my next build.
Back in the mid 80's, all imports of components from foreign countries was stopped, this went on for years. As a benchrest shooter, Sako brass was the standard which everyone used. Scarcity of brass made shooting very difficult, which made me think that I would never put myself in a position to where I would get caught like this again if politics ended imported brass from being available.
So, 6x47L and the 6.5x47L is basically a 22/250AI necked up with slight changes. Neck on the 22/250 brass is just slightly shorter than the Lapua factory brass.
If you are hunting with the brass and ejecting it off into the weeds...you now have some options.