Quality 300 Blackout Once Fired Reloading Brass Pk/100 ea

Name: Quality 300 Blackout Once Fired Reloading Brass Pk/100 ea
SKU: OFB.BO.300-BLKOUT
Price: 15.00 USD
Availability: InStock
Rating: 4.8 (9 reviews)

300 Blackout Cases for Sale

♦ Boxer primer pocket brass case (brass is unprimed)
♦ Out the door prices, no other fees added at checkout
♦ Simple guest checkout and a money-back guarantee
♦ No Credit Card tracking/reporting on your purchases
♦ Shipping with tracking is free on orders over $25.
More details below.

9 review(s)

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Manufacturer: Once Fired Brass - OFB

Availability: Out of stock

SKU: OFB.BO.300-BLKOUT

Manufacturer part number: 300BLKOUT

Delivery date: 2-5 days

$15.00

Bulk Pricing save more!

Quantity (Pks)	Extended Price	Price per Pk
5	$ 72.75	$14.55
10	$ 142.50	$14.25
50	$ 682.50	$13.65
100	$ 1335.00	$13.35

Once Fired .300 Blackout Brass Casings (300 AAC Brass)

Details

300 Blackout Brass Processing

All of our brass has been sorted first Tromels, which remove the 22s, trash and steel casings. Next the we sort by body/rim diameter with Roll Sorters, then by height with SnapSorters. Lastly it is hand sorted to remove nickel, bad and defective cases, and any aluminum that may have slipped through. The brass then may be cleaned with our wet industrial vibratory cleaners (250 lbs at a time) , then dried with a heated corncob mixture to bring out the shine.

When we package the brass, we add an additiona 2-30% extra to coverage any shortages and any bad brass we may have missed.

We offer high-quality, brass 300 Blackout Cases, cleaned and polished, with free shipping. Our testimonials are a testament to our services! The once fired 300 Blackout casings are one of your least expensive options when reloading Blackout ammo. You'll find that reloading the 300 Blackout with these once fired casings is one of the easiest and least expensive rounds to reloading asa shown in our Tier discount pricing. All of our 300 AAC brass includes free shipping for orders $25.00 or more.

Reloading 300 Blackout Brass SAAMI Specs

For your reference we have add the SAAMI Specs for reloading the 300 AAC Blackout Brass. Note trim length of 1.368", however with -..020" acceptable length is 1.348". Always use current reloading manuals for powder and length data.

300 Blackout AAC SAMMI Specifications

Tags

300 blackout brass, .300 blackout brass, brass 300 blackout, 300 aac brass, 300 blackout cases, 300 blackout reloading, rifle relading Used brass

Products specifications

Attribute name	Attribute value
Brass
1 - Type	Brass
2 - Condition	Once Fired Brass
3 - Case	300 Blackout

Existing reviews

300 AAC Brass good deal

Just got this brass in, looks good. Came in just a few days and was well packaged.

From: Bobby | Date: 9/21/2025 10:35 AM

Was this review helpful? Yes No (3/0)

Good quality 300 blackout cases

Second order of these came in. All were in good shape, nice and shiny. Couple of bent mouths that resizing fixed. 1 was a converted 223, but it was good too and I'm using it. Great deal, will be ordering more soon.

From: Jeremy | Date: 8/30/2025 10:35 AM

Was this review helpful? Yes No (3/0)

Best 300 blackout brass I've had in awhile

Ordered from a number of places, and this was the best! The brass 300 blackout was good, but the service and shipping was outstanding! Happy to shop here and will be recommending to my buddies.

From: Guest | Date: 8/21/2025 10:22 AM

Was this review helpful? Yes No (3/0)

300 Blackout Brass OFB

Ordered these awhile ago, and they look great, a few have some minor dents, which are easily shot out. Great clean brass for the price. Lol, read that post about the converted cases. Must be a newbe as when we first started shooting these, converted was about the only things out there! Love to read these reviews and laugh at them!

And if you don't inspect ALL of your brass before you start reloading, you are a special kind of person. I've received new brass from Startline that had a number of cases in them that didn't have primer holes in them!

Some people talk the talk, but don't walk the walk. You can tell a new reloader by how much they bitch and moan about things. Grow up pumpkin!

From: Guest | Date: 7/31/2025 6:17 AM

Was this review helpful? Yes No (7/0)

converted cases

I didn’t expect 20% converted 223 cases, I order from another site that says up front that there maybe up to 20% converted cases but there never is. the description for these said mixed 300 blk headstamps so was disappointed with so many converted cases, other than that everything was as advertised. Oh there was one with a live primer, I deprimed it without any issues but still it shouldn’t have been there

From: Guest | Date: 3/24/2025 10:20 PM

Was this review helpful? Yes No (6/0)

A manager responded to this review

Hello there. Thank you for the feedback. You posted this review as a guest, so I can't reach out to you directly. However, please see our "Brass Information" page (https://www.usreloadingsupply.com/brass-information). On that page, you'll see that we don't sort by headstamp unless specifically stated, which means some amount may be converted, anywhere from 0%-100%. Converted brass is usable. If you find unusable cases, please let us know.

Regarding the primer, even if it was unfired, it was washed in water and a few chemicals/detergents for at least an hour. So, although that's not a guarantee, there is a good chance that it was no longer live. Again, unfired primers are touched on in our "Brass Information" page.

Super!

Just received my second order form US Reloading, and I am impressed with the fast shipping, very high quality of the brass, and super customer service.

From: Guest | Date: 6/11/2024 8:10 AM

Was this review helpful? Yes No (129/0)

Second order

This is my second order of once fired brass and this time tried the 300 blackout. This is just as good as the 308 I received except not decapped. Called and asked, found out they typically decap the larger rifle brass which could be Berdan primed. Makes sense. Thanks.

From: Guest | Date: 12/31/2023 10:46 PM

Was this review helpful? Yes No (144/0)

Mixed head stamp 300 blk brass.

Mixed head stamp 300 blk brass mostly LC, REM, ran all through resizing die for the heck of it, clean, a few still had primers. One casing had been chewed up by the ejector, 102 total so... not bad for the price! Especially in today's environment.

From: Guest | Date: 11/26/2023 4:33 AM

Was this review helpful? Yes No (127/0)

Looks good

Brass looks good, my first order and it looked clean and was easy to inspect.

From: Guest | Date: 11/11/2023 7:20 PM

Was this review helpful? Yes No (140/0)

none

Good brass at a reasonable price. I appreciate it being cleaned before I got it. Tired of ordering and receiving dirty brass from others. Have to clean them before I can inspect them. This brass was easy to inspect. Thank you.

From: Guest | Date: 10/25/2023 6:35 PM

Was this review helpful? Yes No (144/0)

Better than advertised.

Excellent all around. Ordered on 10/19 and received on 10/24. During the initial inspection, I could not find a single unserviceable piece of brass. The count total was 110. Very happy buyer.

From: Gary | Date: 8/26/2023 6:15 PM

Was this review helpful? Yes No (127/0)

Great brass

Brass looks great, and no bad ones. Good prices too, just wish there were more in stock.

From: Guest | Date: 8/26/2023 8:37 AM

Was this review helpful? Yes No (125/0)

Great quality. The best option right now

This brass is very clean and good quality. Most are brass with a few nickel plated mixed in. I had a new rifle built and the only way to get ammo right now is to build your own.

I was pleased how quickly they arrived in the mail too.

From: Guest | Date: 8/12/2023 12:07 PM

Was this review helpful? Yes No (126/0)