A Look at Cartridge Specifications and Ballistics
The 7mm Remington Magnum Unveiled
The 7mm Remington Magnum, often simply called the 7mm Rem Mag, holds a special place in firearms history. Introduced by Remington in the early nineteen-sixties, it quickly gained popularity. Based on the classic .375 H&H Magnum case, the 7mm Rem Mag was designed to offer shooters a significantly improved ballistics performance compared to other common seven-millimeter cartridges of the time. Its success was driven by its effective performance on a wide range of game and the ease of which it could be loaded to suit a variety of shooting pursuits.
The case itself offers a good balance of capacity, efficiency, and overall size. The 7mm Rem Mag typically utilizes a wide range of bullet weights, which are suitable for different hunting and target shooting scenarios. Bullets from the one-hundred-and-forty-grain to the one-hundred-and-seventy-five-grain range are commonly employed, offering a balance between trajectory, sectional density, and retained energy.
When it comes to velocity and energy, the 7mm Rem Mag demonstrates impressive figures. For instance, when employing a one-hundred-and-seventy-five-grain bullet, you can expect muzzle velocities around the two-thousand-eight-hundred-and-sixty feet per second mark, providing excellent downrange energy. The drop at four-hundred yards can be relatively moderate, making it easy to accurately estimate a shot.
Sectional density and ballistic coefficient play crucial roles in a cartridge’s trajectory and energy retention. Sectional density refers to the ratio of a bullet’s weight to its cross-sectional area. Higher sectional density generally leads to better penetration and energy retention. Ballistic coefficient, on the other hand, is a measure of a bullet’s ability to overcome air resistance. A higher ballistic coefficient translates to a flatter trajectory and less wind drift. The 7mm Rem Mag generally offers a very respectable ballistic coefficient with many popular bullet designs.
Exploring the 7mm Shooting Times Westerner
The 7mm STW, or Shooting Times Westerner, takes the already potent 7mm platform to the next level. Initially conceived as a wildcat cartridge, it was created by Roy Weatherby and Layne Simpson, with the goal of achieving even higher velocities and flatter trajectories than the 7mm Rem Mag. Based on the .375 H&H Magnum case necked down to accommodate a seven-millimeter bullet. The STW possesses a notably larger case capacity than the 7mm Rem Mag, which is a significant factor in its enhanced ballistic performance.
Designed to maximize ballistic potential, the STW offers a competitive advantage. When we look at bullet weights, similar to the 7mm Rem Mag, it can handle a large range. But with the case capacity advantage, it often performs best with heavier bullets, capable of being launched at incredible speeds.
The velocity figures of the STW are truly impressive. Utilizing the same one-hundred-and-seventy-five-grain bullet as the comparison, the 7mm STW can often achieve muzzle velocities in the range of three-thousand-and-twenty-five feet per second, and even higher, dependent on the rifle and load. These higher speeds directly translate to flatter trajectories, reducing bullet drop and increasing the effective range. The energy on target at extended ranges can be substantial, offering a significant advantage for long-range hunters.
The advantages in both sectional density and ballistic coefficient are very pronounced as well. The STW can propel heavier bullets to higher speeds, enhancing the ballistic coefficient and enabling them to retain more energy downrange compared to the 7mm Rem Mag.
Comparing the Numbers: A Ballistic Head-to-Head
To truly appreciate the differences, it’s helpful to look at the data side-by-side. To illustrate this, let’s consider the performance of both cartridges using a one-hundred-and-seventy-five-grain bullet, a popular choice for both.
| Range (Yards) | 7mm Rem Mag Velocity (fps) | 7mm Rem Mag Drop (inches) | 7mm Rem Mag Energy (ft-lbs) | 7mm STW Velocity (fps) | 7mm STW Drop (inches) | 7mm STW Energy (ft-lbs) |
|—|—|—|—|—|—|—|
| Muzzle | 2860 | 0 | 3180 | 3025 | 0 | 3570 |
| 200 | 2550 | -2.5 | 2530 | 2740 | -1.8 | 2920 |
| 400 | 2260 | -17.8 | 1990 | 2470 | -10.3 | 2380 |
| 600 | 2010 | -51.1 | 1580 | 2220 | -31.9 | 1920 |
This simple illustration highlights the STW’s advantages, primarily in terms of flatter trajectory and higher retained energy at longer ranges. While the differences may seem subtle at shorter distances, they become significantly amplified as the range increases.
Performance Characteristics: Where They Excel
Effective Ranges: Reaching Out
The effective range of a cartridge is influenced by a variety of factors, including bullet trajectory, energy on target, and the shooter’s skill. The 7mm Rem Mag is perfectly capable of ethical kills at distances of up to five-hundred yards for big game. The flat trajectory and retained energy are sufficient for the game.
The 7mm STW, on the other hand, can extend the range capabilities even further. With its flatter trajectory and higher retained energy, the STW is well-suited for engagements at distances beyond five hundred yards. It can provide better performance than the 7mm Rem Mag at very long ranges, and is often favored by hunters who prefer shots at those longer distances.
Hunting Applications: Matching the Game
Both the 7mm Rem Mag and the 7mm STW are exceptionally versatile cartridges for hunting. They are capable of taking down a wide variety of North American big game species. The 7mm Rem Mag is a stellar choice for elk, deer, and bear.
The 7mm STW offers the same potential as the 7mm Rem Mag but, again, with the advantage of even more reach. The improved ballistics make it an excellent option for larger species, like elk and moose, and the capability of taking down these animals at extended ranges.
When selecting the right bullet, consider the game, the range, and the desired level of expansion and penetration. For instance, controlled-expansion bullets are often chosen for elk and moose to ensure deep penetration.
Recoil: A Matter of Comfort and Accuracy
Recoil is a critical factor that can influence shooting comfort, accuracy, and follow-up shots. The 7mm Rem Mag, while offering substantial power, generally has a manageable recoil. The recoil impulse is usually substantial but easy to handle for many shooters, allowing for quick follow-up shots.
The 7mm STW, due to its higher velocities and larger case capacity, has a more pronounced recoil. This can be uncomfortable for some shooters, and can affect the time it takes for follow-up shots. While the 7mm STW does deliver more power, the shooter’s ability to accurately place shots is critical.
Equipment and Availability: The Practicalities
Rifles: Finding the Right Platform
The 7mm Rem Mag has enjoyed decades of mainstream popularity, making rifles in this chambering widely accessible. Action types are varied, from classic bolt-action to semi-automatic platforms.
The 7mm STW, being a more specialized cartridge, has a more limited presence in the rifle market. Magnum-length actions are typically required. Rifle costs can also vary; custom-built rifles are a common choice for shooters who want to maximize the potential of the STW.
Ammunition: A Supply Chain Snapshot
Ammunition availability is another major factor. The 7mm Rem Mag enjoys widespread availability, with factory loads offered by numerous manufacturers. This includes a broad range of bullet weights and types.
Factory ammunition for the 7mm STW is less common than for the 7mm Rem Mag. Handloading is a necessity to maximize its performance and offers greater flexibility in bullet selection and load customization.
Accessories: Enhancing the Experience
Scope selection is of utmost importance. High-quality scopes with sufficient magnification and good light transmission are essential for long-range shooting. Muzzle brakes can help reduce recoil, but the reduction can come at the cost of added noise. Rangefinders and other long-range shooting tools can significantly increase shooting effectiveness.
Pros and Cons: A Balanced Perspective
7mm Remington Magnum: The Strengths and Weaknesses
Wide ammunition availability, more affordable rifles and ammunition, good hunting performance at typical ranges, more manageable recoil.
Not as flat-shooting as the STW, lower velocities compared to the STW.
7mm Shooting Times Westerner: The High-Performance Option
Superior ballistics, longer effective range, flatter trajectory, higher retained energy.
Higher recoil, more expensive ammunition, less common chambering, shorter barrel life, likely requires handloading and a custom rifle.
Considerations for the Buyer: Making the Right Choice
Who is the Ideal Candidate?
The 7mm Rem Mag is a great choice for the majority of hunters. It’s ideal for those who want a versatile cartridge that is readily available and capable of taking a wide variety of big game. The 7mm Rem Mag is a very good option for those who hunt at typical ranges and do not enjoy handloading.
The 7mm STW is best suited for more dedicated shooters who hunt big game. It’s also the best choice for those who prioritize maximum long-range performance and are willing to invest in specialized rifles and handloading. This cartridge is perfect for those who want to reach out and touch game at distances where the 7mm Rem Mag starts to struggle.
Intended Use: Where Will You Shoot?
Consider how you intend to use the rifle. If most of your shooting will take place at distances within five-hundred yards or less, the 7mm Rem Mag will more than likely suffice. If you frequently hunt at very long ranges, or if you are a long-range target shooter, the STW is very attractive.
Budget: Balancing Cost and Performance
Consider the overall cost of rifles, ammunition, accessories, and the potential need for custom loading. The 7mm Rem Mag is generally the more economical option.
Reloading Proficiency: The Handloading Factor
Handloading significantly expands your options. You can tailor loads to your specific rifle and shooting needs. Handloading is nearly essential to reach the potential of the 7mm STW.
Barrel Life: A Consideration for Long-Term Ownership
Barrel life should also be considered. The 7mm STW, with its higher velocities, will typically experience shorter barrel life than the 7mm Rem Mag. While the 7mm Rem Mag will offer longer barrel life.
Conclusion: Making the Right Decision
Both the 7mm Rem Mag and the 7mm STW are exceptional seven-millimeter cartridges. The 7mm Rem Mag offers excellent performance and versatility and is available. The 7mm STW excels at long range. The best choice ultimately depends on your needs, your intended use, and your preferences. If your shooting focuses on hunting, and you prefer the ease and convenience of factory ammunition, the 7mm Remington Magnum is an excellent choice. However, if you desire the absolute best long-range performance and are willing to invest in handloading and customized equipment, the 7mm STW can be an impressive choice. Both cartridges are capable of bringing down big game and offer a rewarding experience.
Call to Action:
Share your experiences with the 7mm Rem Mag or the 7mm STW. What has been your experience with these cartridges?
