Once you want to take your shooting out to longer ranges and want it to hit hard when it gets there you get into the magnum calibers. The 300 Win. Mag(Winchester Magnum) and 7MM (Remington Magnum) are very popular in hunting circles here in the United States because of their good ballistics at range on larger game such as elk. This will go over the key differences and similarities between the 300 Win. Mag and 7MM.
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300 Win. Mag vs. 7MM: Ballistics
The first and perhaps the most important thing to consider is the ballistics of each caliber as that is the real meat and potatoes what matters. But in case you aren’t used to all of the ballistic jargon I’ll give some quick definitions so it makes a little more sense.
· FPS- Feet per second
· Ballistic Coefficient- A number that determines how well a bullet flies through the air. The closer to the number 1 the better it flies and less drag it has.
· Ft lbs- Foot pounds-how much energy a bullet impacts with.
· Grains- Bullet Weight
300 Win. Mag factory loads tend to be heavier by 5-10 grains than 7MM. This means they are very similar rounds in that regard and their ballistics reflect that. On the heavier end with a good bullet made for long range or hunting they both have a ballistic coefficient over .5 and going up to around .55 and have a muzzle velocity of around 2900 fps.
All of this is great to know but basically what it comes down to is how much a bullet will drop at distance and how much force it will have once it gets there. When it comes to the overall punch the heavier 300 Win. Mag bullets usually hit with a couple hundred ft lbs more than the heavier 7MM bullets. The bullet drop is also very similar with the slightly lighter 7MM loads dropping around six inches (remember this is all load and bullet grain dependent).
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300 Win. Mag vs. 7MM: Best choice
Now that you have a basic understanding of how these calibers match up the real question is why would you pick one over the other. With a boat tail spire point bullet they both can possess a great ballistic coefficient so either one can be great longer range calibers. The main difference comes down to the fact that a 300 Win. Mag will have more energy transfer at range than the 7MM with heavier bullets.
While the numbers may seem negligible the slightly better ballistics of a 300 Win. Mag can make a larger difference the longer the distance is you need to shoot. When you begin trying to reach out past a thousand yards all environmental factors really begin to take effect and you need every little advantage you can get ballistically from your gun. A couple hundred ft lbs of energy and a hundred fps more can make a beneficial impact on your longer range shots. The difference in shorter ranges around 300 yards and closer they will be very nearly identical so once again it is the range that these subtle differences really play a part.
In terms of the cost, just like the ballistics, the prices are nearly identical. You won’t save a lot of money going one way or another so price per round doesn’t really distinguish a difference. These are popular enough calibers that plenty of variants of these rounds are out there from budget type rounds up to higher end match ammo and potent hunting loads. Compared to even bigger long range calibers they are not super expensive so they are pretty fairly priced for the range you can squeeze out of the rounds.
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300 Win. Mag vs. 7MM: Conclusion
Both of these calibers will work well as hunting calibers on larger game and that is primarily where they have become well known. The .300 Win. Mag has also become popularized because of its use in military circles, especially with snipers. You would be well served with either of these calibers but depending on the distance you plan on shooting you may benefit from the slightly better ballistics available from the .300. Keep in mind factors such as wind and humidity and air temperature play a key role regardless of caliber. Ballistic tools such as wind speed gauges and ballistic calculators help to make your shots easier with these magnum calibers at range. Thank you for reading and check back for more content.