Oh heck if you can find it buy it and shoot it. I don't consider it any worse on the chamber than aluminum cases. Our country loaded steel cased 45 back in WWII. Saving strategic metals I guess. I have shot it(and loaded it too) with no issues. Yep the combloc stuff IS a bit dirtier...brush and a swab cleaning patches or whatever...I have had no issues with any I have shot... And I bought a bunch of Tulammo last March for 2.88 a box