Site Notices. Meyers' New "Pocket Rocket". Keep seeing these variants listed. I know they have 55 grain bullets, but is there another difference? Is one better than the other? All XM product is the same regardless of the sku or part number. Well then it's not first quality then, is it? If there's no difference, why the "X"?
BS on Federal's part. Quote History. Quoted: Well then it's not first quality then, is it? Other manufacturers may omit the distinction entirely.
The difference between a 5. Also note that the relatively long M projectile will work well in a twist barrel, but will likely incur performance problems in twist or twist barrels.
The M is less sensitive to barrel twist, but may present issues when fired from a barrel with a slower twist. So, get ready for some range time. We can say though — if penetration is your priority you would most certainly be happier with a magazine full of M cartridges. When is someone going to publish information that there is a difference of dimensions between the cartridge case of the M and the M The M system designator does not determine the cartridge case but the type of bullet,weight, overall length of complete cartridge as completed, and bullet diameter.
It does not identify that the case has a slightly different radius of the shoulder and that the neck is longer, which means that a high pressure could exist if a M cartridge is fired in a M or. Since this article is about the M vs. M bullets, we focused only on the differences in these two projectiles.
We do touch on that pressure difference in our Wylde article. I found that with M, I would have to aim slightly lower to account for bullet rise. Does the increased velocity of the M decrease the rise in bullet height for distant targets?
Is that accurate? Save my name, email, and website in this browser for the next time I comment. View Larger Image. Types of 5. Dummy rounds have six indents on the sides of the shell casing to denote that it is a dummy round with no powder inside. The primer is removed so the firing pin can pass through safely with each dry-fire.
The M is a functional shell casing with gunpowder loaded inside. At the business end, the casing is crimped with no bullet in place. The crimping allows appropriate pressure to build in the chamber and barrel in absence of a live round, allowing the rifle or pistol to cycle as if it were firing a live round. Contrary to believe, the M does not have a steel core penetrator like the M The M is merely an extended tracer round with a grain bullet.
The M short-range training ammo, or SRTA, allows for live-fire indoors where rifle ammunition would not normally be allowed. This ammo can be used to train at distances of 25 meters or less. Importantly, many AR owners and military service members zero their rifles for meters, at 25 meters. You should not use SRTA ammo to do this, even though the firing distance is the same. Ballistics for the M round are wildly different compared to M and M, and doing this will result in an inaccurate zero.
Federal 5. S Military. Service-issued ammunition is labeled as "M" steel-core penetrator or "M" conventional ball ammo. The civilian equivalents to these rounds are labeled "XM" and "XM". Federal Premium says the quality and consistency of both labels are the exact same, and both lines of ammo are produced at the same manufacturing facility, using the same methods and processes.
Home 80 Lower Blog The 5. Holographic Optics Explained Muzzle Brakes vs. Flash Hiders vs. Best Sellers. What does it all mean?! Also M can not be sold surplus, but XM, it not technically being military ammo, can. I have heard they simply label them differently so they can sell them on the civilian market. I have never had any issues shooting it, and have never seen any problems at the range where we see quite a bit of it shot. M is an actual mil spec, and not too many manufacturers claim to meet it.
Does it actually meet the spec I don't know. XM is only so so in my opinion. I've been into Wolf Gold from Taiwan lately and think it's much nicer ammo. Originally Posted by TomMcC. Originally Posted by CatSnipah.
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