The 10MM Auto was designed primarily for law enforcement but was quickly abandoned in favor of the .40 S&W. Now making a comeback, this .40" caliber handgun is more powerful than the .45 Auto with higher magazine capacity.
Very satisfied with my first order. After spending countless trips to the range (and many backbreaking hours) just to collect brass for my hobby, finally the end of all that. You have the best prices out there, I’ve researched greatly and there is no comparison. Thank you D.K. for allowing me to spend more time enjoying reloading/target shooting!
Mark O. Feb 24, 2019
I've been ordering with Diamond K Brass for the last six months or so - I've never seen faster order fulfillment anywhere. I always receive quality cases (and always more than the ordered count). In the thousands of cases I've ordered to this point - in both 9MM and 40S&W, I can count on one hand the number of cases that have not been usable. Amazing service!
Joshua Wilson Dec 11, 2020
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
F/V RUFFIAN Feb 27, 2020
This was my second order from Dimond K. I ordered 1000 .223 cases and after processing and loading I ended up with 1022 rounds. Of the handfull that were not usable a couple could have probably been salvaged with a small base die and a couple were caused by an unnoticed press issue. Dimond K is my new go to place for brass when the folks at the range get it all before I do.
SteveY Sep 27, 2016
Ordered .308Win Commercial brass quantity 500 on 1/17 and is out for delivery today the 19th.
2 days from AZ to SC. Fantastic!
Unlike some places where you order something, get a shipping label, and it sits in the shipping department for 24 to 48 hours before actually shipping, DiamondK is on the ball!
My source for once fired brass.
Geoff Jan 19, 2018
First order for 500 45 ACP Brass and to my supprise about 90% were my favorite to reload, Federal Brass. Brass was clean, polished and like new. Price was a little higher than what I pay at gunbroker.com but the quality was well worth the difference. You just got another repeat customer.
Jerry Parris Oct 10, 2014
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.
Luther Watson Apr 25, 2020
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!
Wesley Davis Jan 22, 2016
I ordered 223/5.56 200+ last month. It came double bagged with no trash. Clean brass. Ordered another 500 this month. Impressed with Diamond K. Fast shipping, no trash brass. Will order more in the future.
mjmike Jul 10, 2015
So far I've purchased casings for my F&N five-seven and couldn't be happier with what i received, I am getting ready to place a much larger order of multiple calibers. I tell everyone I know about this company,they are on their "A|" game all the time and are a pleasure to work with.