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I called Diamond K and left a message about their 10mm auto brass , I also left a text message inquiring about manufacter test brass . I was surprised how quickly both questions were answered . Tammy was the one who handled both questions ,she actually cared about want my concerns were and took the time to get an asnwer for me . the best compliment a company came get is to be told there customer service is great ,so here it is Diamond K Brass your customer service is outstanding Thanks John

Been using Diamond for a while now and if any problem call Tammy and she makes it right, or just call and say Hi. Great people to deal with. Have ordered from 22TCM up to the 458 Win Mag and all the pistol brass in between., never a problem, thanks Diamond and Tammy

Ordered 2000 40S&W cases on Tuesday and they were in mailbox on Thursday of this week (Jan 21.2016)! Cases are clean ready to reload right out of the box. Having ordered here before and sorting thru this order doubt there are any rejects. Being a reloader and tend to pick up brass as does every other reloader I ever met I feel confident the brass from Diamond K is once fired since a nonreloader either leaves the brass where it falls or sweeps it up and deposits in the barrel at most ranges. These are the guys to deal with if you need volume and quality. Thanks guys!

Diamond K Brass simply rocks! Quick turn around and great customer service. New reloader here and they have been so helpful with so newbie questions. Happy top have found them!

Just received my order and just had to say that the hard to get brass would be a 10+ on a scale of 10, they all look to be once fired brass.

Thank you!

For years I purchased brass from more companies than I can remember but once I found Diamond K Brass I never went elsewhere. They are the real deal that delivers what they advertise!

I ordered 200 8MM Mauser berdan primed brass, I received well over 200 cases but about 40 were cases I couldn't use. The reason is they were different calibers, but in good shape and useable. I still received enough 8MM brass to do what I need to do. I am still very happy with this purchase. I would buy again, and the service is excellent. Diamond K gets 5 stars.

I ordered 2,500 used brass in .357 Sig. It arrived two days later in excellent shape. Good quality brass, clean, no dings or dents. I will be ordering again.

ORDERED 1000 CASING OF .223, RECEIVED 1016 AND HAD 6 I COULDN'T PROCESS.
GREAT PEOPLE TO BUY FROM.

Right on the button. 500 45 acp brass, all good, 30 of 500+ were small primer as stated, no complaints, I'd do it again, personal, friendly, professional service, thank you. RB.