Nee, een 7 mm (0.284 inch) kogel is niet groter dan een .300 Win Mag (0.308 inch).
The . 300 Winchester Magnum has a slightly longer case length (2.62″ vs 2.5″) as well as a shoulder that sits . 156" further forward than the shoulder of the 7mm Rem Mag. Though they both have the same rim diameter and are very similar in overall length, the .
Cartridge Specs
The 7mm PRC bullet has a diameter of 0.284”; the 300 Win Mag, 0.308” (same as 30-06 Springfield and . 308 Winchester). This equates to different neck diameters (0.2846” for 7mm PRC; 0.339” for 300 Win Mag). These two rounds' cases also differ in length.
I would say 300 win mag is best for elk. You definitely should use a larger bullet, 180 or more,copper plated lead (soft). 7mm rem mag are made for lighter grain bullets. Yes you can kill elk with a 7mm rem mag but do some research on barrel twist with the heavy grain bullet.
Shooting from a standard 24-inch barrel, a 7mm-08 Rem with a 140-grain Remington Core-Lokt Tipped leaves the muzzle around 2,860 feet per second, carrying roughly 2,542 foot-pounds of energy. The 308 Win with a 150-grain Core-Lokt Tipped clocks in at about 2,820 feet per second with 2,648 foot-pounds of energy.
The 7mm Remington Magnum delivers better ballistics: it shoots faster, with more energy, and a flatter trajectory. While it packs a bit more recoil than the . 30-06 Springfield, it's still fairly comparable. The 7mm Remington Magnum certainly offers an advantage if you'll be making long distance shots on larger game.
300 Win Mag barrels for the Mk13 rifles as used by the US Navy Seals since the inception of the rifle. This is the rifle used in the stories in the book American Sniper by SEAL Chris Kyle.
At 300 yards, we'll see the . 300 Win Mag has dropped 6.1” compared to the 7mm Rem Mag's 6.8”; out to 500 yards, the . 300 Win Mag will drop 36.0”, while the 7mm Rem Mag will drop 38.8”.
30-06 produces a similar recoil impulse, but it is slightly less than the 7mm. Ammo availability and cost go to the . 30-06 as well. Both calibers are popular, but Federal lists 35 varieties of .
The 7mm PRC case also is in the middle, shorter than the . 300, longer than the 6.5. It has maximum efficiency without being overbore capacity. With the specified COL of 3.340 inches, case length allows today's heavy bullets to be used in standard (.
By 500 yards, the 6.5 PRC has pulled ahead with an additional 94 ft-lbs of energy over the . 300 Win Mag. Once again, if you're looking for added power, you'll find it in the . 300 Win Mag up to 500 yards, and in the 6.5 PRC past that point.
Someone asked me what bullet they should shoot in a 300 Winchester Magnum for woodland whitetail hunting and I said nothing get too big of a cartridge. Well it really isn't. It's bigger than you need but the 300 windmag is capable of doing everything and anything.
The . 300 Remington Ultra Magnum is one of the largest commercially available . 30 caliber magnums currently being produced. It is a beltless, rebated rim cartridge, capable of handling all large North American game, as well as long-range shooting.
The effective range of a 300 Win Mag for hunting big game is about 500 yards for the average shooter. In the hands of a skilled marksman, it can easily hit a 1,300-yard target.
If you do need the increased performance the 7mm is flatter, better in the wind, and has less recoil. The 300 WM has better terminal performance but is harder to shoot well.
While we initially did not include the 7mm Rem Mag in our ammo section, it actually does have a sniper history, primarily with the US Secret Service. They used the 7mm Rem Mag for a good number of years using ammo loaded by HSM.
Depending on the speed of the ammo, that would put me close to zero @ 300 yards and about 8-9 inches low @ 400 yards. Elk have an approx., kill zone of 20 -24 inches, so that sight in will put a bullet in the kill zone out to 400 yards nicely. But, practice shooting out to those ranges, and see what your ammo is doing.
The 300 Win Mag, which was designed strictly for hunting, has found a new lease on life as a sniper cartridge. It kicks a lot more than the 30-06, and has a short neck which gives some people fits, but it's more accurate than the old-timer, and far better at long range.
Military and law enforcement departments have also adopted the cartridge as a long-range sniper round, intended to be used for shots at longer ranges than the . 308 Winchester. As a testament to its accuracy, following its introduction, it went on to win several 1,000-yard (910 m) competitions.
Not only that, but two of the original gunsmiths who worked closely with Kyle to outfit the TAC-338 he deployed with are on the project. Although Kyle used a . 300 Winchester Magnum for most of deployments, his most famous and longest shot was taken with a McMillan-built TAC-338.
First, it established that a 7mm uses . 284-inch diameter projectiles. Make the conversion: 7mm equals . 276-inch; .
308 can have a greater accuracy potential than 30-06. It has to do with the length of the powder column. 308 runs at the same maximum pressure, but the case is about 11mm shorter.
Cartridge Specs
The 30-06, as you might guess, fires 30-caliber or 0.308” diameter bullets while the 7mm Rem Mag fires 0.284” diameter bullets (7.2mm). While the case length for the 30-06 is only 0.006” shorter than the 7mm, the case capacity is quite different between the two.