I have been fortunate in always finding Norma 9.3x72R brass along the way and now that I no longer have a 9.3x72R rifle to feed all the new brass has either been converted to 360 2 1/4/9.3x57R (360) or is being held in reserve. My latest use for it is a 360 Nitro Rigby/Jeffery single and I'm sure if I approach the 30 grains Cordite with 300 grain bullet load that it is proofed for I may run through some brass. The brass that I used in my first 9.3x72R back in the 1970s is still in use (and I have never shot black in it or used fillers).