RWS has made brass, dont know how its now, but with TMF 190 grain bullet wit R 903 powder of weiht from 47-51 grain it s pushed out from 550 ms to 660 ms, COL 85,3mm.

I saw adrilling here for about 1300 us and a kipplauf for about a 1000 us, Sellier &bellot makes brass aswell and theyre alright, i dont know if it can be reloaded with heavier bullets, but the lighter would probably work but i think that the velocity would be low.