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7mm WSM Ballistics

January 2, 2021 By Joshua Gillem

The 7mm Winchester Short Magnum is a newer 28 caliber centerfire rifle cartridge developed in partnership with Browning Arms Company and Winchester ammunition

This rifle cartridge made its debut and was introduced to the shooting public in 2001.

The 7mm short magnum cartridge is chambered in Winchester’s Model 70 bolt action rifle and is based on the 404 Jeffery cartridge case.

The parent case was shortened to 2.100″ and necking down to .284″ with sharpened shoulder angles, to 35 degrees.

The 7mm WSM cartridge offers plenty of case capacity for tailored handloads, and it really excels for those who take pride in fine tuning their loadings.

The 7mm WSM cartridge achieves its useful purpose as an excellent long range cartridge for mule deer, sheep, black bear, and elk, as the .284″ caliber is a time-proven caliber for elk and deer size game animals.

Any decent rifle will need a good scope. Check out this one from Bushnell.

The 7mm WSM cartridge is a well thought out cartridge as Winchester is no stranger in .284″ caliber cartridge development. Winchester has now developed 2 cartridges in this caliber; (284 Winchester in 1963), and (7mm WSM in 2001).

The 7mm WSM factory loadings show a velocity of 3,225 feet per second for a 140 grain bullet for deer and sheep hunting and this translates to moderate recoil for the shooter.

There is plenty of bullet energy left over at the 500 yard mark to cleanly flatten a larger deer size animal with a well-placed shot.

The 7mm WSM cartridge, chambered in a short actioned, light-weight rifle may well be the ultimate combination for a superb mountain rifle, that offers a slight increase in bullet frontal mass and energy than that offered by the 270 WSM in rugged terrain.

Most rifles chambered in this cartridge show plenty of accuracy with long range 160 grain weight bullets.

7mm WSM Ballistics:

7mm Winchester Short Magnum Ballistics Chart #1:
Rifle barrel length: 24 Inches.
Ammunition: Winchester 140 grain Ballistic Silvertip bullet.
Bullet diameter: .284 inch.
Bullet weight: 140 grains.
Bullet ballistic coefficient: .460.
Rifle zero: 240 yards, 2″ mid-range rise.
RangeMuzzle50 yds.100 yds.200 yds.300 yds.400 yds.500 yds.
Bullet Velocity:3,225 fps.3,115 fps.3,008 fps.2,802 fps.2,605 fps.2,416 fps.2,236 fps.
Bullet Energy:3,233 ft.lbs.3,016 ft.lbs.2,812 ft.lbs.2,440 ft.lbs.2,109 ft.lbs.1,815 ft.lbs.1,553 ft.lbs.
Bullet Drop:– 1.8″+ 0.4″+ 1.7″+ 1.4″– 3.4″– 13.4″– 29.3″
7mm Winchester Short Magnum Ballistics Chart #2:
Rifle barrel length: 24 Inches.
Ammunition: Winchester 160 grain XP3 bullet.
Bullet diameter: .284 inch.
Bullet weight: 160 grains.
Bullet ballistic coefficient: .512.
Rifle zero: 264 yards, 3″ mid-range rise.
RangeMuzzle50 yds.100 yds.200 yds.300 yds.400 yds.500 yds.
Bullet Velocity:3,050 fps.2,955 fps.2,862 fps.2,683 fps.2,510 fps.2,344 fps.2,184 fps.
Bullet Energy:3,306 ft.lbs.3,102 ft.lbs.2,910 ft.lbs.2,557 ft.lbs.2,238 ft.lbs.1,951 ft.lbs.1,694 ft.lbs.
Bullet Drop:– 1.8″+ 0.8″+ 2.5″+ 2.5″– 2.3″– 12.7″– 29.4″

Filed Under: Ballistics, Hunting Tagged With: 7mm, 7mm wsm ballistics, ballistics, hunting ballistics, rifle ballistics

About Joshua Gillem

Josh is a lifelong practitioner and student of the gun. He grew up shooting/hunting with his dad, and was given his first gun, a 12 gauge shotgun, when just a small boy. After high school, he joined the Marines where his love for firearms blossomed as he qualified with an M16A2, an M9, and a 240G. Josh has been writing about firearms and tactics for several years, is a staunch supporter of the Second Amendment, and believes that each individual person has the right to self-defense by any means necessary. Currently residing in gun-friendly North Carolina, he carries a concealed gun on a daily basis, even in his own house.

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