458 SOCOM: “Make Sure The Round Peg Fits The Round Hole”
The 458 SOCOM experienced a massive surge of popularity over the past decade. This surge meant that A LOT of folks jumped into the market looking to make a quick dollar. While this is good for the cartridge, it created some problems.
In recent years, we have received numerous phone calls and emails from folks asking us why their 458 SOCOM wouldn’t chamber. In working through these problems, the most common root cause has been guns with chambers that are cut to incorrect tolerances, as well as 458 SOCOM ammunition that do not meet correct specifications.
The 458 SOCOM is a different beast as compared to the 223 Rem / 5.56. It has a large case area which makes the cartridge more sensitive to incorrect tolerances and less forgiving to loading errors. Building an AR15 and loading the ammo can be finicky. The errors generally cannot be seen with your naked-eye, nor identified by measuring the cartridge with calipers. Out of specification ammunition cannot be checked using you’re AR15 rifle, the barrel extension blocks the view of the chamber so “bad” ammo is not identified until you try and chamber a rd, the bolt locks closed or it will not chamber at all.
The will allow you to know instantly if cases have been resized correctly or if loaded ammunition will fit into the chamber of a properly chambered 458 SOCOM. It is to the original Teppo Just specifications and design.
Or you can just “push the easy button” and order ammunition from SBR. We have the widest variety of 458 SOCOM ammunition on the market ranging from Sub-Sonic heavy weights, to Top Shelf hunting loads like the Barnes 300 grain TTSX to our LaserMatch tracer ammunition. And each and every round we sell has already been gauged in a gauge exactly like you see above.