Is M855A1 bad for your gun?
The M855A1 is a widely used type of 5.56x45mm ammunition that has sparked debates among firearms enthusiasts and gun owners about its effects on their firearms. While it is undeniably an effective rounds for hunting and self-defense, its unique characteristics may pose certain challenges for the longevity of a gun.
Downsides
The primary concerns about M855A1 are the increased pressures and wear and tear it imposes on firearms. Here are some reasons why gun owners should exercise caution:
• Accelerated barrel wear: The M855A1 is designed to withstand higher chamber pressures, which can lead to accelerated wear on the barrel. This is particularly evident in rifles with shorter barrel lengths.
• Faster bolt carrier group (BCG) wear: The increased pressure also results in accelerated wear on the BCG, which may require more frequent maintenance or even replacement.
• Gas port erosion: The M855A1 produces more gas residue than other types of ammunition, leading to potential issues with the gas system, including increased erosion on the gas ports and chamber walls.
• Feed ramp issues: M855A1’s steel-core design may lead to wear on the feed ramps, potentially affecting reliability and potentially causing feed jams.
Is it really bad?
While these concerns are valid, it’s essential to understand that the impact of M855A1 on firearms can vary significantly depending on factors such as:
• Rifle design: Certain rifle designs, particularly those with optimized chamber dimensions, may perform better with M855A1.
• User maintenance: Regular cleaning, lubrication, and inspection can significantly extend the lifespan of your gun.
• Use scenario: Using M855A1 exclusively for self-defense or recreational shooting, versus using it for tactical applications, will also affect wear and tear.
So, should I switch?
Whether to switch from M855A1 or not ultimately depends on your specific circumstances. If you notice significant issues with your rifle after using M855A1, consider consulting with a firearms expert or switching to a more traditional 5.56mm round like the M855.
Here’s a Comparison Chart of the two popular 5.56x45mm rounds:
| M855A1 | M855 | |
|---|---|---|
| Bullets | Steel core | Copper-plated jacket |
| Chamber Pressure | Higher (61,500 PSI) | Standard (51,500 PSI) |
| Terminal Ballistics | Superior penetration, yaws | Lower penetration, fragments |
| BCG Wear | Faster wear | Slightly slower wear |
While M855A1 excels in terms of penetration and effectiveness, the faster wear it causes on your rifle should be a crucial consideration in your decision.
What about armor-piercing rounds?
It is essential to differentiate between standard M855A1 ammunition and Armor-Piercing (AP) variants, such as the infamous "black-tip" M855. The latter is designed to pierce personal armor and vehicle armor and is heavily restricted due to its potentially deadly nature. Standard M855A1, however, is meant for recreational, hunting, and self-defense purposes, not armor penetration.
In conclusion, while M855A1 does pose specific challenges for your gun, it’s essential to understand the nuances and consider individual circumstances. Proper maintenance and inspection, along with knowledgeable use, can help extend the life of your rifle. As a responsible firearms owner, it’s vital to make informed decisions regarding your firearm and ammunition.