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The .277 Wolverine is a 5.56 NATO based wildcat that was designed to give near 6.8 SPC performance out of an AR-15 type rifle, without requiring a specialized bolt or magazines. Since the Wolverine only requires a barrel change, it is one of the most affordable AR conversions. This is touted as an all-purpose cartridge that not only gives excellent down range performance for its size, but it is also well suited to pistol or SBR, and subsonic/suppressed applications.

Barrels are available for Savage bolt actions and AR’s, as well as dies and other accessories from Mad Dog Weapons Systems .



  250 for $86.00
$0.34/each

  500 for $149.50
$0.30/each

  1000 for $277.00
$0.28/each

* 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.



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Elijah Towne
Rothbury, Michigan
December 19, 2018
Product Review

Raymond McCally
CURLEW, Washington
March 08, 2018
Product Review
Many thanks for giving us some 277 Wolverine brass. More time to shoot and less time assembling loads. Excellent results like all Starline brass.

Dvalin Hrafnsson
Trego, Montana
March 08, 2018
Product Review
Thanks for producing 277WLV brass! This is my favorite all around AR15 cartridge and now don't have to convert brass to keep shooting. Great brass at a reasonable price.

Randy M
Fairbanks, Alaska
February 12, 2018
Product Review
Great to get head stamp 277wlv brass great for the growing 277wlv also thanks to starline I’ve used your brass in dozens of other cartridges I fire and I’m never been disappointed by your products.

Shanon Copeland
Topeka, Kansas
January 30, 2018
Product Review
I just had my first outing with my new batch of star line 277 wolverine brass. I had great accuracy results and the cases loaded/fit and worked flawlessly! Great stuff thanks!

Bill Deane
Knoxville, Tennessee
January 30, 2018
Product Review
It is absolutely fantastic to get such high quality brass for my .277 Wolverine!

Joe Walker Jr
Whetstone, Arizona
December 26, 2017
Product Review
I've made several 1,000 .277 Wolverine cases from USGI 5.56x45mm brass. While it isn't hard to do - buying perfect quality ready-made brass from Starline is awesome. Thanks for adding this product and recognizing this up-and-coming cartridge!

John Hull
Freeport, Illinois
November 15, 2017
Product Review
Every Starline case I've ever used has been of the highest quality in materials and dimensions. The Wolverine is no different. I've formed thousands of cases from LC brass, and would say the new Starline is better than my meticulous work. It also has the correct headstamp, If you're a Wolverine fan, or new to the caliber, you can't do any better than this brass.

Bruce Finnegan
Waverly, Iowa
November 15, 2017
Product Review
This new brass from Starline is awesome, it fits the wolverine chamber perfect capacity is right with lc converted brass, accuracy is as good too. it is great now i don't have to convert brass and actual wolverine headstamped brass thanks starline.