Choosing between the Glock 21 and Glock 20 often comes down to personal preference and intended use. Both are popular full-size handguns, but they differ significantly in cartridge, capacity, and recoil characteristics. This detailed comparison will help you determine which pistol best fits your needs.
Caliber: The Core Difference
The most significant difference lies in their caliber:
- Glock 21: Chambers the powerful .45 ACP (Automatic Colt Pistol) cartridge, a well-established round known for its stopping power.
- Glock 20: Fires the potent 10mm Auto cartridge, originally designed as a law enforcement round and later gaining popularity for self-defense and hunting.
This fundamental difference impacts almost every other aspect of the guns, from recoil to ammunition availability and cost.
.45 ACP Advantages:
- Stopping Power: Widely regarded for its effective stopping power, making it a favorite for self-defense.
- Ammunition Availability: .45 ACP ammunition is readily available and relatively inexpensive compared to some other calibers.
- Recoil Management (relatively): While still substantial, the .45 ACP recoil is generally perceived as easier to manage than the 10mm's sharper recoil.
10mm Auto Advantages:
- Higher Velocity: The 10mm offers higher velocity and flatter trajectory than the .45 ACP, extending effective range.
- Greater Penetration: 10mm rounds often penetrate deeper than .45 ACP rounds, though this is highly dependent on bullet construction and load.
- Versatility: The 10mm can be used for self-defense, hunting smaller game, and even some forms of competitive shooting.
Capacity and Dimensions
While both are full-size pistols, subtle differences exist:
- Glock 21: Holds 13 rounds in standard magazines.
- Glock 20: Holds 15 rounds in standard magazines.
The Glock 20 is slightly larger and heavier due to accommodating the longer 10mm cartridge. This difference is minimal for most shooters but should be considered for concealed carry.
Recoil and Shootability
This is a subjective area, heavily influenced by individual shooter characteristics and preferences:
- Glock 21: The .45 ACP recoil is substantial, but many find it manageable due to its relatively slow recoil impulse.
- Glock 20: The 10mm's recoil is sharper and more noticeable than the .45 ACP's. It's a snappier recoil that some find more difficult to control.
Choosing the Right Glock: Consider These Factors
- Intended Use: Are you primarily looking for a self-defense handgun, a hunting pistol, or something for range use? The intended purpose will heavily influence the best choice.
- Experience Level: New shooters might find the .45 ACP's recoil easier to manage, while experienced shooters might prefer the 10mm's power and versatility.
- Physical Characteristics: Consider hand size and strength when selecting a pistol. The Glock 20's slightly larger size and stronger recoil might be less comfortable for shooters with smaller hands.
- Ammunition Cost: Factor in the cost of ammunition over time, as 10mm Auto ammunition can be more expensive than .45 ACP.
Conclusion
The Glock 21 and Glock 20 are both capable and reliable handguns. The ultimate choice depends on your individual needs and preferences. Carefully consider the differences in caliber, capacity, recoil, and intended use before making your decision. Renting or shooting both pistols at a range is highly recommended before committing to a purchase.
