The DEVA, the German institute for testing of hunting and sporting arms, is an organisation independent of the guns & ammo industry. Members are of course German gunmakers from factories to small country gunsmithes, the German hunters and target shooters associations as well as many individual members, hunters, handloaders and target shooters. Every member may have his home-brewed loads tested there for pressure, velocity and consistency.
"DEVA tested" means this 10.75x68 load, 400gr Woodleigh in front of 68gr VV N140 and a CCI 250 primer in an RWS case, cartridge over all length 83.2 mm, gave an instrumental velocity 3 meters from the muzzle of 2165 fps from their 65 cm = 26" test barrel. Further this load was within the CIP working pressure limit of 3300 bar (electric transducer) for the 10.75x68.