the 22 hornet is a serious hunting cartridge on roe deer if legal. and I dont forget the old german 6,5x27R, also developt as a small game cartridge for the different wood grouse.
the 6,5x27R was shooting a 5,3 gramm softpoint bullet at 480 m/sec and was used on roe deer also.
brass for the 7x33 can maybe made from the a little bit undersized 222 rem. such kind of reloading cartridges(8x63 swedisch from 30 06 brass) works not bad if you center the cartridge in the chamber with tape. I dont know if 5,45x39 brass is now in production, believe PRVI has anounce it once.
donelly wrote that the round use a 120 grain .284 bullet and similar stuff is available from 100 -120 grains. a nice little plinking cartridge
we have leaving the the 9,3x53R topic but my gunmaker wont be able before february to start