Search Search Search Browse menu. Sign in. Recent updates. Formats OverDrive Magazine. Languages English. OverDrive Magazine. Why is availability limited? Sign in Cancel. Individual soldier weapons will likely remain in 5. The new 6. However, various tidbits from a few in-the-know Army officers has shed some light on the subject.
For instance, according to Army Chief of Staff General Mark Milley, this is a weapon and cartridge that could defeat any body armor now and any planned body armor that we know of in the future. The details of exactly how much armor needs to be penetrated and at what distance remain a secret. From the limited information we have been given, we know the Army has developed, manufactured and given the projectile they know that will meet their requirement to the industry to develop ammunition.
There is no good explanation on why it has to be a 6. There is nothing magical about the 6. My theory is that 6. I further suspect that this might be some odd tip-of-the-hat to the. Had we adopted the. First off, I bet it weighs approximately to grains and must travel at velocities close to 3, feet per second fps from to inch barrels to meet Army needs. The only way to get that kind of performance from those lengths of barrel is to run chamber pressures up around 80, to 90, pounds per square inch psi.
This would put proof loads over , psi. Anything higher than that and the gun quickly beats itself to death. Pressures exceeding 55, psi in rifles designed for high pressure come with some definite advantages and a handful of disadvantages. The biggest advantages of high-pressure ammunition are substantially increased velocities, the option to attain those velocities from much shorter barrels and improved terminal effects. Here are the three chosen candidates.
SIG Sauer was the first one to commercially offer the benefits of high-pressure ammunition when they unveiled the. This round uses a three-piece case that has a steel case head, brass body and a locking washer that mechanically connects the two. The company did tell me that the commercial variant is loaded to slightly lower pressure because SAAMI is cautious about approving such high chamber pressures.
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