Cheapest 300 BLK Brass in Stock
Live unit-price comparison for 300 blk brass across major reloading retailers. Listings refresh throughout the day; in-stock status reflects the most recent crawl. Sorted by price per ea.
- 1
300 Blackout Brass
The Brass King300 BLKOnce-Fired$0.01/eaThe Brass King
$13.00 / 1000
- 2
300BLK Brass and 220gr Cast Lead Bullets
Blue Ridge Brass300 BLKOnce-Fired$0.05/eaBlue Ridge Brass
$49.00 / 1000
- 3
NEW .300 BLACKOUT STARLINE 200+
Starline300 BLKOnce-Fired$0.07/eaDiamond K Brass
$68.00 / 1000
- 4
Processed 300 AAC Blackout Brass
Arm or Ally300 BLK$0.07/eaArm or Ally
$70.00 / 1000
- 5
Starline 300 Blackout Brass
Starline300 BLK$0.07/eaArm or Ally
$74.83 / 1000
- 6
300 Blackout Headstamp Processed Brass
Blue Ridge Brass300 BLKOnce-Fired$0.08/eaBlue Ridge Brass
$79.99 / 1000
- 7
Primed 300 Blackout Brass
Arm or Ally300 BLK$0.09/eaArm or Ally
$88.99 / 1000
- 8
Swiss P 300 Blackout Brass, New Primed Brass – Norma Headstamp, made by Swiss P
Norma300 BLK$0.09/eaRaven Rocks Precision
$89.00 / 1000
- 9
Nickel 300 Blackout Brass
Blue Ridge Brass300 BLKOnce-Fired$0.10/eaBlue Ridge Brass
$95.00 / 1000
- 10
Hornady Unprimed Brass Rifle Cartridge Cases .300 Blackout 50/ct
Hornady300 BLK$0.18/eaNatchez Shooters Supplies
$18.49 / 100
- 11
STARLINE, INC - 300 AAC BLACKOUT BRASS
Starline300 BLK$0.34/eaBrownells
$33.99 / 100
- 12
Hornady Brass 300 Blackout Unprimed Bulk Bag of 100
Hornady300 BLK$0.35/eaGraf & Sons
$34.99 / 100
- 13
Starline Brass 300 Blackout Unprimed Bag of 100
Starline300 BLK$0.35/eaGraf & Sons
$34.99 / 100
- 14
Hornady Brass 300 AAC Blackout Unprimed
Hornady300 BLK$0.56/eaGraf & Sons
$27.99 / 50
- 15
Nosler 300 AAC Blackout Bulk Unprepped Brass
Nosler300 BLK$0.71/eaArm or Ally
$177.88 / 250
Stock changes hourly.
Get an email when new 300 blk brass hits the shelves at sub-MAP prices.
Common questions about 300 blk brass
- Where is the cheapest place to buy 300 blk brass right now?
- We refresh prices throughout the day and rank every in-stock listing by unit price. Today, in-stock prices range from $13.00 to $177.88 across the 8 retailers we track. The top-ranked listing on this page is the lowest unit price our crawl found in the most recent run.
- How often is this price list updated?
- Listings refresh on an hourly cadence. The "Updated" date in the trust strip above shows when the most recent listing was crawled. In-stock status reflects what each retailer's product page said at that moment — by the time you click through, an item that was in stock may be sold out, especially for high-demand calibers and primers.
- Why are prices so different across retailers?
- Pack size, lot size, and shipping policy create most of the variance. Hazmat fees on powder and primers can swing the effective per-unit cost by 30% or more depending on how many qualifying items you order together. The unit prices on this page already normalize for pack size, but always verify the pack size and shipping fees on the retailer's site before checkout.
- Why is some 300 blk brass out of stock?
- Reloading components — especially primers and certain handgun powders — go through cyclical shortages driven by manufacturer scheduling, ATF transit rules, and election-year demand spikes. We don't surface listings that are out of stock here, but you can subscribe to the back-in-stock alert above and we'll email the moment something hits the shelves.
- Do you sell 300 blk brass directly?
- No — Primers and Powder is an independent price-comparison tracker. We don't carry inventory and we aren't a retailer. Every listing on this page links to a third-party retailer where the actual transaction happens.