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300 AAC BLACKOUT BRASS Reviews & Ratings

Starline 300 AAC Blackout brass allows owners of this popular AR-15 cartridge to experiment with both supersonic and subsonic loads, all without worrying about the consistence of their brass. Starline 300 AAC Blackout brass was produced particularly for users of this popular AR caliber. The 300 AAC Blackout was designed to allow users to have a heavy .30-caliber projectile that could be optimized for use with a suppressor and subsonic loads.

Starline is a family owned business and prides itself on producing the highest quality brass case available. With a production process focused on quality not quantity, Starline makes the finest brass and has for more than 40 years out of their state-of-the-art manufacturing facility in Sedalia, MO.

Allows for multiple reloads
Sells in 100 and 500-count quantities
Packaged in loose-packed bags

See all of our AR15s and AR15 parts here.

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Reviews Summary

Customers are thoroughly impressed with the 300 AAC BLACKOUT BRASS, praising its exceptional quality and consistency. Many reviewers highlight its reliability and suitability for multiple reloadings, making it their top choice. Overall, there's a strong consensus of satisfaction with no significant concerns raised.

What Reviewers Are Saying

Product Quality

100%

Reviewers consistently describe the brass as exceptionally well made and of high quality. Many mention its durability and performance, particularly noting it can be reloaded multiple times without issue, which adds to its appeal.

Consistency and Reliability

100%

Multiple reviewers emphasize the consistency in dimensions and performance of the brass. This reliability ensures a smooth reloading experience, with no issues arising during use, further solidifying its reputation among customers.

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Excellent Brass

works well - I recommend a full length resize before loading some case mouths will have minor dents NBD.

by JAMES C. on June 09, 2026

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Top Quality Brass

Have never had any issues with Starline brass. Exceptionally well made.

by DAVID Z. on February 05, 2024

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Excellent brass

The quality of Starline price for its price point is excellent. Very consistent and able to reloaded multiple times before primers pockets give. This is my go to brass when in stock.

by ELLIOT H. on January 07, 2024

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Great brass

Starline is top of the line brass. Demensions are right on the money. Would highly recommend . Was very happy to find at Brownells.

Quality product - reasonably priced

No hesitations buying this stuff - always clean/proper size/length/no blemishes/bullets seat easily without warping brass. Quality product that's reasonably priced & will last several re-loadings.

Starline 300 BLK Brass

This brass is very consistent, and of great quality. I do not have a comment as far as how many loadings yet. Looking at what I have fired so far. I would say 5 plus should be easy to get unless you are running super hot loads. I will be buying more. I would recommend this brass.

Top notch

Never had any issues with any starline brass in any caliber.