nocturnal, check out www.grafs.com
Apparently, they convinced Hornady to load ammo for them under the Graf and Sons name, but it is identical to the 3 loads Hornady has sold---150, 165 and 168 gr. Apparently the 150 gr are highly sought after and I've only been able to find them at this website. Having them with ballistic tips is a (very nice) bonus!
It seems GP11 was mostly made in 1979 who knows how much of it is left. I'm well stocked, although I may get more before long. It is the standard for our K31s and cool piece of history...
1944 Mauser byf K98 8mm, K31 7.5 x 55 Swiss, Rem M700 Classic 8mm, 1920s Colt New Service .45 LC, Browning Hi-Power and HK P7 in 9mm, SAIGA .308 22", SKS 7.62x39mm, S&W 686 Plus 6" and Taurus 617 2" in .357 Mag, Ruger MkIII Target 5.5" BB .22LR, Mossberg 500 & Marlin 120 in 12 GA, etc.