A 300 WSM Trajectory Chart is a technical reference guide that illustrates the predictable flight path and vertical drop of various factory ammunition loads for the 300 WSM (Winchester Short Magnum) cartridge across distances ranging from 100 to 600 yards. By utilizing this data, shooters can determine the precise holdover required to compensate for gravity and environmental factors when engaging targets at extended ranges. This essential resource relies on variables like high muzzle velocity and optimized ballistic coefficients to provide a standardized expectation of how different bullet weights perform in the field. Mastering this chart allows for significantly improved accuracy and consistent shot placement in long range hunting or target applications.
300 WSM Trajectory Chart
| Manufacturer | Load Name | Weight (gr) | Type | BC | MV (fps) | 100y Drop | 200y Drop | 300y Drop | 400y Drop | 500y Drop | 600y Drop | Zero (y) |
| Winchester | Expedition | 180 | AccuBond | 0.507 | 2970 | 0.0 | -2.1 | -7.3 | -16.0 | -28.6 | -45.5 | 200 |
| Hornady | Precision Hunter | 178 | ELD X | 0.552 | 2980 | 0.0 | -2.0 | -7.0 | -15.1 | -26.7 | -42.1 | 200 |
| Nosler | Trophy Grade | 165 | AccuBond | 0.475 | 3150 | 0.0 | -1.8 | -6.4 | -13.9 | -24.7 | -39.1 | 200 |
| Federal | Premium | 180 | Partition | 0.474 | 2960 | 0.0 | -2.1 | -7.4 | -16.3 | -29.3 | -46.7 | 200 |
| Browning | BXR | 185 | Rapid Exp | 0.427 | 2950 | 0.0 | -2.1 | -7.5 | -16.6 | -30.0 | -48.2 | 200 |
| Hornady | Superformance | 150 | SST | 0.415 | 3270 | 0.0 | -1.6 | -5.6 | -12.1 | -21.4 | -33.9 | 200 |
Readers should use this trajectory chart by first identifying their specific ammunition load and verifying the muzzle velocity matches their barrel performance. By selecting the recommended 200 yard zero, you can easily calculate the necessary elevation adjustments for various distances by observing the drop values listed in inches. Always cross reference your rangefinder readings with these drop figures to ensure your point of aim compensates correctly for the bullet arc.
Understanding The 300 WSM Trajectory Chart
The data provided in the table serves as the foundation for your ballistic calculations in the field. Understanding these values helps you anticipate how different bullet weights react to gravity as they travel downrange.
Trajectory Analysis
Comparing the 150 grain Hornady Superformance against the 180 grain Winchester Expedition shows a clear distinction in long range performance. At 500 yards, the 150 grain load drops approximately 21.4 inches, whereas the heavier 180 grain load drops significantly more at 28.6 inches. This demonstrates that lighter bullets maintain a flatter flight path, allowing for less holdover at extended distances.
Velocity Analysis
Muzzle velocity is the primary driver of the 300 WSM’s flat trajectory. The 150 grain Hornady Superformance hits a high 3270 fps, which results in the least amount of drop across all distances measured in our table. In contrast, the 185 grain Browning load at 2950 fps exhibits a steeper arc, requiring more precise compensation as the distance increases toward 600 yards.
Ballistic Coefficient Analysis
The ballistic coefficient (BC) is a measure of a bullet’s ability to overcome air resistance. The 178 grain Hornady ELD X boasts a BC of 0.552, which helps it retain energy and fight drag more effectively than the 185 grain BXR, which has a lower BC of 0.427. Even though the BXR starts at a comparable velocity to the 180 grain loads, the superior BC of the ELD X allows it to maintain its velocity and trajectory profile better at distances beyond 300 yards.
Best Factory Loads Based On The Chart
For varmint hunting at mid ranges, the 150 grain Hornady Superformance load is an excellent choice, combining high velocity with a balanced drop profile. Predator hunters often prefer the 178 grain ELD X due to its higher BC, which offers more stability against wind compared to the lighter options. For long range target shooting, the 178 grain ELD X provides the most consistent performance, as the aerodynamic profile helps buck wind deflection more effectively than the other loads listed.
Key Takeaways From The Chart
The 150 grain Hornady Superformance load is the fastest factory offering in our table at 3270 fps, resulting in the flattest trajectory. The 178 grain Hornady ELD X maintains the highest ballistic coefficient at 0.552, making it the most efficient load for retaining velocity downrange. The 180 grain loads provide a robust option for long range hunting where terminal energy retention at 400+ yards is a priority.
Common 300 WSM Bullet Weights
The 300 WSM is most effective when loaded with specific bullet weights designed for high velocity, typically ranging from 150 to 185 grains.
150 Grain
These bullets are designed for maximum speed, often exceeding 3200 fps. Their primary advantage is an extremely flat trajectory, making them ideal for long range shots where holdover is a concern. The downside is that their lighter mass can lead to more rapid velocity loss at extreme ranges.
165 Grain
The 165 grain weight offers a perfect middle ground between the high speed of the 150 grain and the heavy impact of the 180 grain. It is often favored by hunters who want a flat trajectory but need the structural integrity of a heavier bullet for big game.
180 Grain
This is the standard hunting weight for the 300 WSM. It balances high muzzle velocity with significant sectional density, making it suitable for taking everything from deer to elk. It provides a good compromise for hunters who want consistent terminal performance.
185 Grain
The 185 grain load is the heavy end of the factory standard for the 300 WSM. While it produces the most drop of the common weights, it provides the best wind resistance and long range energy. It is often chosen for elk or moose hunting where terminal energy at 400+ yards is critical.
Effective Range
Varmint Hunting
For small varmints, the 300 WSM is effectively a 500 yard cartridge when using the 150 grain loads. The trajectory data confirms that drop remains manageable within this range, allowing for minimal holdover adjustments.
Predator Hunting
When hunting predators like coyotes, the effective range is extended to roughly 600 yards, provided the shooter accounts for the ~40 to 50 inch drop shown in our chart. Beyond this distance, bullet energy is still sufficient, but wind drift becomes the limiting factor.
Target Shooting
The 300 WSM is a highly capable target round out to 600 yards and beyond. At this distance, the trajectory requires significant elevation compensation, but the inherent accuracy of the cartridge makes it an excellent choice for long range work.
Long Range Shooting
Long range shooting beyond 600 yards is well within the capabilities of the 300 WSM, especially with high BC bullets. It requires precise ballistic software and consistent ammunition to account for environmental variables like wind and density altitude.
Factors That Affect 300 WSM Trajectory
Bullet Weight
Lighter bullets accelerate faster but lose energy more quickly. Heavier bullets retain energy better and are less affected by crosswinds, as seen in the comparison between the 150 and 185 grain loads in our table.
Muzzle Velocity
Higher muzzle velocity directly correlates to a flatter trajectory. Every increase in velocity reduces the time of flight, which leaves gravity with less time to pull the bullet down.
Barrel Length
Factory data is often based on 24 inch barrels. If your rifle features a shorter barrel, you will likely see a reduction in muzzle velocity, which will require you to adjust your drop data accordingly.
Ballistic Coefficient
A higher BC allows a bullet to cut through the air more efficiently. As shown in our analysis of the 178 grain ELD X, a higher BC leads to less velocity loss over distance, which ultimately results in less vertical drop at long ranges.
Wind
The 300 WSM’s high velocity helps mitigate wind drift, but it does not eliminate it. Even with a fast 150 grain bullet, a strong crosswind will push the bullet off course, making high BC bullets like the 178 grain option preferable on windy days.
Temperature
Extreme temperature changes can affect powder burn rates and air density. Higher temperatures can lead to higher muzzle velocities, while lower temperatures increase air density, causing more drag.
Altitude
Higher altitudes mean thinner air, which creates less drag on the bullet. If you are shooting at high elevations, your bullets will fly flatter and hit higher than the trajectory chart would suggest.
Zero Distance
Selecting a 200 yard zero is the industry standard for the 300 WSM, as it creates a manageable arc that stays relatively close to the line of sight from 100 to 300 yards.
Best Zero Distance
100 Yard Zero
A 100 yard zero is simple to confirm, but it requires more holdover for any shot past 200 yards, which is inefficient for a flat shooting cartridge like the 300 WSM.
200 Yard Zero
This is the most recommended zero for the 300 WSM. It aligns perfectly with the flat trajectory, allowing the shooter to aim point blank for most hunting scenarios out to 250 yards.
250 Yard Zero
Zeroing at 250 yards stretches the point blank range even further, ideal for open field hunting where long distance shots are the norm.
300 WSM Compared To Similar Cartridges
| Cartridge | Trajectory | Velocity | BC | Effective Range | Wind Drift | Recoil |
| 300 WSM | Very Flat | High | High | 600y+ | Low | Moderate |
| 300 Win Mag | Flat | High | High | 600y+ | Low | Moderate |
| 308 Win | Moderate | Moderate | Moderate | 400y+ | Medium | Low |
| 7mm Rem Mag | Very Flat | High | High | 600y+ | Low | Moderate |
The 300 WSM remains a powerhouse, offering ballistics comparable to the 300 Winchester Magnum while utilizing a shorter, more efficient action. While the 308 Winchester is more common, it cannot match the extreme velocity or flat trajectory of the 300 WSM. The 7mm Remington Magnum offers similar performance, but the 300 WSM is often preferred for those who favor the .30 caliber bullet selection.
Frequently Asked Questions
Is the 300 WSM still a good round for long range?
Yes, the 300 WSM is an excellent long range round due to its high velocity and ability to handle heavy, high BC bullets.
What is the best bullet weight for 300 WSM?
For most hunters, the 180 grain bullet is considered the sweet spot, offering the best balance between energy and accuracy.
Does the 300 WSM have heavy recoil?
The recoil is moderate, similar to a 300 Win Mag, but it is manageable with proper stock fit and a good recoil pad.
Can I use 300 Win Mag data for my 300 WSM?
No, you should never use data from another cartridge, as pressure levels and case capacities differ significantly.
What is the effective range of the 300 WSM on elk?
The 300 WSM is highly effective on elk out to 600 yards and beyond with proper shot placement.
Why do my shots drop more than the chart says?
If your shots are dropping more than expected, your barrel may be shorter than the test barrel, resulting in lower muzzle velocity.
Is the 300 WSM considered a match-grade cartridge?
Yes, many factory loads are match-grade, and the cartridge is inherently accurate for long range target work.
Does wind affect the 300 WSM?
Yes, but its high velocity helps it resist wind drift better than many smaller or slower cartridges.
What zero distance should I use for hunting?
A 200 yard zero is widely considered the best setup for general hunting.
Are there factory loads for 300 WSM?
Yes, major manufacturers offer a wide variety of hunting and match loads for the 300 WSM.
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