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Many thanks to Douglas and staff for ensuring my satisfaction over the years and thousands of cases I've ordered. Their grasp of quality control for the volume of business done, is impeccable. I will continue to use their product. I've not found any other brass retailer close to pricing and quality.

I ordered 200 of the once-fired 300 BLK cases offered. When they came, about half of the cases had a circular impression from the pressure barrel that they were fired in. After sizing and polishing this mark was still quite visible. I assume this will be a weak spot in the cases. I emailed Diamond K TWICE and have yet to get a reply about whether or not they are going to replace the defective cases. NOT GOOD CUSTOMER SERVICE, GUYS.

I ordered from Diamond K for the first time last week. I am very impressed with the quality of the product, as well as the excellent, and very prompt customer service. These folks are great. I will definitely be ordering from them more in the future, as well as recommending them to all of my reloading pals.

I ordered 2000 rounds of polished 223/556 brass. Fast shipping, on my doorstep three days later. I did not count the number of cases that arrived but the headstamp breakdown is as follows: 5.56-WCC 40%, LC 32%, FC 16%; assorted 223 headstamps 12%. Brass well polished with only five rejects in the lot. Great product and service.