I've had one of the SAKO single shot heavy barrel, so called "Benchrest" rifles chambered in 6PPC USA for the past 20+/- years.
Got the rifle, T36 scope, Redding dies, 500+ pieces of SAKO brass, and a few thousand bullets as a consignment sale.
Shortly after that, I also sourced 100 Lapua 220 Russian, and fire formed it and neck turned it for a very close fit to my chamber.
The lot of brass I received had to be neck turned to fit, and I exclusively shoot it.
So, I have 500+ pieces of SAKO brass that has been weight sorted by the previous owner - 400 of which still have bright primer pockets, but dark interiors - possibly only fired once?
I might be convinced to part with some, but 220 Russian is currently about 2$ a piece, and that's before the COW fire forming, neck turning, and second firing to fully blow out the shoulder...