.277 Wolverine Overview
The .277 Wolverine (277 WLV) was designed to effectively utilize abundant 5.56 cases and 6.8 (.277) projectiles in various weights. It combines excellent performance with versatility by using all standard AR15 mil-spec parts and magazines, with a barrel swap being the only thing necessary.
Why? Well, for the past half-century, the choices in a compact and portable, but powerful, capable of a high ammunition load out, versatile and reliable rifle platforms have been the AR15 or the AK47 (The 5.56 or the 7.62x39 generally speaking). We have always wanted something that combines the attributes of both cartridges. When the 300BLK came out, we decided it wasn't exactly what we were looking for. The 6.8SPC came close, but still wasn't as versatile or as easy for the end-user as we wanted; the need for 6.8 specific magazines and bolts is a complication for some folks. So, we decided to move forward with this concept, the .277 Wolverine. The .277 Wolverine could be considered a hybrid of the 6.8SPC, the 300 Blackout, the 7.62x39 and the .223/5.56 NATO, making it THE MOST versatile cartridge for the standard AR15 platform.
Why? Well, for the past half-century, the choices in a compact and portable, but powerful, capable of a high ammunition load out, versatile and reliable rifle platforms have been the AR15 or the AK47 (The 5.56 or the 7.62x39 generally speaking). We have always wanted something that combines the attributes of both cartridges. When the 300BLK came out, we decided it wasn't exactly what we were looking for. The 6.8SPC came close, but still wasn't as versatile or as easy for the end-user as we wanted; the need for 6.8 specific magazines and bolts is a complication for some folks. So, we decided to move forward with this concept, the .277 Wolverine. The .277 Wolverine could be considered a hybrid of the 6.8SPC, the 300 Blackout, the 7.62x39 and the .223/5.56 NATO, making it THE MOST versatile cartridge for the standard AR15 platform.
277 Wolverine Related Products
AR Barrels: Barrels come in various lengths, finishes and twist rates. We have in our product line 8.5", 10.5", 12.5", 14.5", 16", 18" and 20" for the AR Platform. Twist rates vary from 1:11 for supersonic-only applications, and 1:7 for supersonic AND subsonic applications. Please visit our store to see what barrels we may have in stock.
Savage Pre-Fit Barrels: Savage pre-fit barrels are available in many configurations by custom order, or, see what profile(s) we have in stock by visiting the store. These barrels are also available in 1:11 or 1:7 twist.
AR Bolts/BCG's: Proprietary bolts are not needed, any mil-spec AR15 5.56 bolt will work.
Loaded (Commercial/Factory) Ammunition: There are several companies manufacturing loaded ammunition as well as ready to load brass.
JB's Firearms: http://www.jbsfirearms.com/category-s/1831.htm
Others: Red Stagg Ammunition, American Custom Ammunition, and more soon to come!
Die Sets: Custom 2-Die sets are made by Hornady and Lee, and are available in our store for purchase.
Parent Brass: 5.56./.223 is the parent case for the 277 WLV, and Lake City brass was the brass we used for most of the cartridge's development. Other manufacturers work as well, and offer different benefits. However, the standard brass for conversion to 277 WLV is Lake City.
Factory Headstamp Brass: Hornady and Starline: Both Hornady and Starline produce new, factory, WLV-headstamped brass, ready to load. Please see our store to purchase. No more converting 5.56 brass for those that don't want to!
Trimmers: Little Crow Gun Works produces .277 Wolverine "World's Finest Trimmers" (WFT's) WFT 1's (The original) made for the .277 Wolverine as well as WFT 2's (interchangeable inserts) with .277 Wolverine-specific inserts are available in our store now.
We also currently offer "WCT's" (World's Cheapest Trimmer) in WLV - a less expensive option.
We also currently offer "WCT's" (World's Cheapest Trimmer) in WLV - a less expensive option.
Case Gauges and Ammunition Gauges: Sheridan Engineering produces "Slot" and "Standard" ammo gauges for the .277 Wolverine. We offer them in our store as well.
.277 Wolverine Specs and Tech Data
.277 Wolverine Concept Cartridge Drawing:
Pictured from left to right.
5.56
.277 Wolverine
.300BLK
6.8SPC
Pictured from left to right.
5.56
.277 Wolverine
.300BLK
6.8SPC
Basic Range Results
So far, using a 5R rifled 16" AR barrel, we are seeing Sub-MOA groups and the following results from the following bullets in handloads. The results are quite exciting! Please visit the MSR Evolution Forum where you will find substantial load data posted by our shooters.
So far, using a 5R rifled 16" AR barrel, we are seeing Sub-MOA groups and the following results from the following bullets in handloads. The results are quite exciting! Please visit the MSR Evolution Forum where you will find substantial load data posted by our shooters.
- 85 grain MPG - 2750fps
- 90 grain TNT - 2700fps
- 95 grain TTSX - 2600fps
- 100 grain Accubond - 2600fps
- 110 grain Sierra Pro-Hunter - 2500fps
- 110 grain Hornady V-Max - 2500fps
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