I once read on another forum that the brass used to make the Swede training ammo was often "condemned" brass deemed not suitable for full power milspec loads. The Swedes highly encouraged the use of saving brass and reloading as evidence by the plethora of headstamps in these sealed cases.
I have found the above statement I read to be true, as using 140g bullets over 33 grains of H4895 I have had 1 out of 100 show signs of head failure on extraction, I still have the case in my bucket. The head is cracked all the way around with soot around the seam, didn't fully let go and no gas felt escaping.
That being said, I wear glasses with the rifle and still consider the use of the brass okay. Not match grade stuff unless one wanted to weigh and sort each case. I paid $160 shipped to my door for 4800 rounds of the stuff from JGsales. This yields 4800 primed cases and 16lbs of useable powder loaded with Unique data.
The only waste here is the wood tips! Although I may consider keeping them and turning them into charcoal in my retort for my homemade blackpowder. It's like the circle of life around here!