Buy .340 WBY MAG Ammo for Sale
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Weatherby Select Plus 340 Weatherby Mag 225 grain Barnes TTSX Rifle Ammo, 20/Box - B340225TTSX
Brand:
Weatherby
Bullet Type:
BARNES TIPPED TSX
Caliber:
.340 WBY MAG
Grains:
225 grain
Rounds:
20
(10)
Weatherby Select Plus 340 Weatherby Mag 225 grain Spire Point Rifle Ammo, 20/Box - H340225SP
Brand:
Weatherby
Bullet Type:
Spire Point
Caliber:
.340 WBY MAG
Capacity:
20
Grains:
225 grain
Rounds:
20
(0)
Weatherby Select Plus 340 Weatherby Mag 250 grain Partition Rifle Ammo, 20/Box - N340250PT
Brand:
Weatherby
Bullet Type:
Partition
Caliber:
.340 WBY MAG
Grains:
250 grain
Rounds:
20
Marketplace Insights
★ 4.8/5
based on 10 customer reviews across 3 variants from 12 retailers
Highly praised .340 Weatherby Mag delivers devastating one-shot kills on large game with exceptional performance, though notable recoil is expected.
What customers like
One-shot lethal performance70%
One shot, the thousand lb browney was down. There was no need for a second shot.
Excellent for large game60%
From big hogs in California to bears in AK. The 340 has knocked them all down with ease.
Reliable across distances40%
I have used my 340 Weatherby for Elk hunting for 25 years, and it performs superbly at all distances.
Versatile caliber choice30%
It is a fantastic all round, do it all caliber.
Common concerns
Significant recoil10%
It does have a bit of a kick.
Frequently Asked Questions
Buy .340 WBY MAG Ammo for Sale
What caliber is a 340 Weatherby Mag?
.340 Weatherby Magnum is a .338-caliber cartridge with a bullet diameter of .338 inches. It is a belted magnum necked up from the .300 Weatherby and produces higher velocities than the .338 Winchester Magnum.
What is the difference between 338 Lapua and 340 Weatherby mag?
The 338 Lapua has greater case capacity (114.2 gr vs 98 gr), but the 340 Weatherby can match it in velocity and energy despite the smaller case. The 338 Lapua was designed for long-range military and precision shooting, while the 340 Weatherby was built for big game hunting. Both fire .338-diameter bullets.
What is the effective range of the 340 Weatherby Magnum?
The .340 Weatherby Magnum has an effective range of around 450 yards for hunting large game under practical field conditions. With premium handloads and quality optics, some shooters extend this further. The cartridge produces roughly 5,000 ft-lbs of muzzle energy, retaining substantial power at distance.
How much recoil does a 340 Weatherby Magnum have?
The .340 Weatherby Magnum generates approximately 44 ft-lbs of recoil energy with a 250-grain bullet in a 10-lb rifle. Lighter 210-grain loads reduce recoil by roughly 12%. This places it among the harder-kicking magnums, demanding good technique for comfortable extended shooting sessions.
What is the best powder for 340 Weatherby?
RL-22 is the top choice for .340 Weatherby hunting loads, outperforming other powders by at least 100 fps across bullet weights. IMR 7828 and H4831SC are also strong performers favored by reloaders. Work up loads carefully in this large magnum case, as position sensitivity can affect consistency.
How much is a case 340 Magnum?
A case of .340 Weatherby Magnum ammunition typically costs around $119 per box, with most listings ranging from $65 to $130 depending on bullet weight and manufacturer. Note that "a case" usually refers to multiple boxes, so total cost varies by quantity purchased.