224 Valkyrie
Since 1976

Unprimed Brass Cases

458 SOCOM Brass (Large Pistol primer)

1.569 - 1.576 O.A.L.

The SOCOM is an awesome cartridge that is basically a long 50AE (O.A.L. of 1.575") with a rebated .308 style head configuration, necked down to utilize a .458" diameter projectiles. It has been chambered in some bolt guns but it's claim to fame is in the AR-15 platform. Complete firearms and uppers are available from www.wilsoncombat.com , www.teppojutsu.com or call (832) 524-8100 or www.rockriverarms.com or call (866) 980-7625. Dies are available from most major manufacturers.

Status: Available Now

Box of
458 SOCOM Brass

*Starline Brass does not sell any loaded ammunition. What you are purchasing are brass cases only and will need to be loaded into ammunition in order to be fired from a firearm.


Overall Rating
4.9 Stars4.9 Stars4.9 Stars4.9 Stars4.9 Stars
Reviews: 13
Sam C of Dickinson, North Dakota
5 Stars5 Stars5 Stars5 Stars5 Stars
All I can say is WOW! From start to finish,THIS product is what Ive been looking. Outstanding brass! THANKS for quality you can count on Starline!!!

Roger H of Clayton, Missouri
5 Stars5 Stars5 Stars5 Stars5 Stars
Outstanding product Exactly as it should be! Never disappointed in Starline

Roger H of Honolulu, Hawaii
5 Stars5 Stars5 Stars5 Stars5 Stars
Great product, exactly what I expected from Starline. Can't go wrong with this company's products. Always top flight, never disappoints in quality and customer service is second to none. Service AFTER the sale. Outstanding!

Mike M of Chattanooga, Tennessee
5 Stars5 Stars5 Stars5 Stars5 Stars
Excellent Brass. Shipping was fast. After checking several dozen pieces out of the box all measured 1.575. First 10 test loads with 325ftx over acc1680 5 shot groupings all holes touching. Second group the same. This is with a Tromix barrel. Very impressed with Starline. All I need know is starline to produce 300 AAC Blackout brass! :-)

Charles S of El Paso, Texas
5 Stars5 Stars5 Stars5 Stars5 Stars
I have been reloading for over 23 years and used my own used brass or new brand name brass. I was apprehensive about using Star Line until after trying their products. Now I cannot say enough good things about their brass. They have good quality control procedures in place and provide a superior product for reloading. I have been using both their brass and nickel plated brass in a variety of calibers from 380, 9mm, 357 SIG to 45 LC, 45-70, 458 SOCOM and about half a dozen I did not mention for about two years now, so I had no concerns when I found out they were my only option for 458 SOCOM Brass. I am very pleased. Their 458 SOCOM brass and nickel plated brass slip right into my headspace gauge without re-sizing. The brass lasts beyond my expectation without annealing. I am more concerned about the brass from the factory ammo I ordered with the factory's headstamp on their brass, a noticeable quality difference from StarLine's. I strongly recommend StarLine Brass for all brass reloading needs.

Charles S of El Paso, Texas
5 Stars5 Stars5 Stars5 Stars5 Stars
When I first purchased brass from star-line I was originally skeptical of their brass/company; however, I have used it in everything from 9mm pistols to my 45-70 with no complaints, so I was confident the 458 SOCOM brass I needed would be of the highest quality. Shipping was fast and everything looked great upon arrival. I am willing to recommend Star-Line brass to anyone who reloads and needs brass. Do not hesitate to purchase star-line if you need brass for reloading.

Robert R of Saint Paul, Minnesota
5 Stars5 Stars5 Stars5 Stars5 Stars
This is the only show in town for .458 socom brass, but as such it is the best brass I have worked with (in any calibre). I am glad they make it, as my Wilson .458 socom is a fantastic AR, an auto that replicates my 45-70. Thank you guys.

Dustin P of Corvallis, Oregon
5 Stars5 Stars5 Stars5 Stars5 Stars
I load my 458 fairly warm with H110 Hodgdon behind 325 FTX bullets with excellent results. To date I have reloaded my Starline 458S brass 11 times and no signs of thinning Web or other signs of fatigue. The price is unbeatable when loading compared to buying, load at your own risk.

Dale R of st.Paul, Indiana
5 Stars5 Stars5 Stars5 Stars5 Stars
since Indiana made the 458 socom legal to hunt with I have loaded a couple different brands of cases in this caliber the starline is very durable as some have been loaded 6+ times with minimal stretch and little wear. I highly recommend this product.

Tony S of Haltom City, Texas
5 Stars5 Stars5 Stars5 Stars5 Stars
I bought a box of 500 and not a bad one in the box. I use them with Barnes TAC-TX, Lil Gun powder, and Remington primers. So far I've reloaded each one at least once. When they become available again I will get at least 500 more, maybe 1000. If you need them don't hesitate.

duck r of bend, Oregon
5 Stars5 Stars5 Stars5 Stars5 Stars
An update..,Been shooting a lot. This brass is giving me absolute, total satisfaction. Am very pleased with the quality!!!

James A of Mobile, Alabama
4 Stars4 Stars4 Stars4 Stars4 Stars
This is the only brass that has ever been in my RRA. It seems to be very durable compared to brass I use for other calibers. I would give it 5 stars if Starline could build it faster. Such a long wait for my first order I was about to give up, and that was beforenthings got really crazy.

duck r of bend, Oregon
4 Stars4 Stars4 Stars4 Stars4 Stars
i use this brass in a rock river rifle. all the printed data i have seen is very hot! suggest you start at min. load. i experienced a few hurt cases from ex. pressures. i am happy / starline.