.284 | 139gr | Hornady CX
by Hornady · See details on brand website
The Hornady ECX bullet is a lead-free, expanding copper alloy projectile engineered for reliable terminal performance and deep penetration. Its sleek, aerodynamic profile ensures high ballistic efficiency, while the distinctive polymer tip enhances accuracy and initiates controlled expansion on impact. Perfect for hunters seeking a non-toxic solution, the ECX bullet is ideal for medium to large game such as deer, antelope, and African plains game, providing excellent energy transfer and consistent results.
Specifications
Weight
139 gr (9.01 g)
Diameter
0.284″ (7.21 mm)
Sectional Density
0.246
BC G1
0.429
Type
CX
Min. Twist
1:7.5
Related Load Recipes
Load recipes using .284 | 139gr | CX are available in the following cartridges:
7 mm PRC
7-6.5 PRCW
7 mm Rem. Mag.
7-.300 Norma Mag.
7 x 72 R
.28 Nosler
7 mm Rem. Ultra Mag.
7 x 57
7 mm Mag. Fl. H&H
7 x 75 R SE v. Hofe
.280 Ackley Improved
7 mm STW
7 x 57 R
7 mm Blaser Mag.
7 mm Weath. Mag.
7 mm Exp. Rem.
.280 Rem.
7 mm KM Katzmaier
7 x 61 S&H (Super)
7 mm Backcountry
7 mm SAW
.280 Riml. N.E. Ross
7 FCP
7 x 64 Brenneke
7.21 Firebird
7 x 65 R Brenneke
Similar Bullets
Same-caliber projectiles within ±0.003", ±5gr and matching lead content from other brands.
.284 | 140gr | TTSX BT
Barnes · 140gr · BC 0.412
.284 | 140gr | Expansion Tip
Nosler · 140gr · BC 0.489
.284 | 139gr | HDB Universal
Reichenberg · 139gr · BC 0.257
.284 | 143gr | Hunter
Hammer · 143gr
.284 | 140gr | Blade
SAKO · 140gr · BC 0.365
.284 | 139gr | LRX BT
Barnes · 139gr · BC 0.434
.284 | 140gr | TSX BT
Barnes · 140gr · BC 0.394
.284 | 140gr | AERO SB,- smax:17.20
Styria Arms | AERO · 140gr · BC 0.4519
.284 | 140gr | Powerhead Blade Pro
SAKO · 140gr · BC 0.442
.284 | 135gr | HP
Atomic 29 · 135gr · BC 0.39
.284 | 135gr | Spezial Jagd
Reichenberg · 135gr · BC 0.227
.284 | 140gr | VLR-4
Peregrine · 140gr · BC 0.498
Community Load Data for .284 | 139gr | CX
Loads for .284 | 139gr | CX from our community:
3 loads
| cartridge | Powder | Barrel (in) | Charge (gr) | OAL (in) | Max. Pressure (psi) | Muzzle Velocity (fps) |
|---|---|---|---|---|---|---|
| 7 mm PRC | Reload Swiss RS 70 | 20.0 | 62.9 | 3.291 | 7 (0%) | 2904 |
| 7 mm PRC | Reload Swiss RS 70 | 20.0 | 65.0 | 3.291 | 8 (0%) | 2999 |
| 7 mm PRC | Reload Swiss RS 70 | 20.0 | 65.0 | 3.306 | 8 (0%) | 2956 |