Load data for .444 Marlin + 225gr Barnes XPB
Based on C.I.P., the max. allowed case length is 2.225 in / 56.52 mm, the max. cartridge length is 2.570 in / 65.28 mm, and the max. allowed pressure is 51,488 PSI / 3,550 bar.

Based on C.I.P., the max. allowed case length is 2.225 in / 56.52 mm, the max. cartridge length is 2.570 in / 65.28 mm, and the max. allowed pressure is 51,488 PSI / 3,550 bar.

Load Specifications
ImperialMetric
Bullet:.429 | 225gr | XPB
Cartridge:.444 Marlin load data
Case Length (L3):2.225" | 56.5 mm
Cartridge Length (COL/L6):•••
Seated Depth:0.582" | 14.8 mm
Case Capacity:68 gow | 4.41 cm³
Primer Size:Large Rifle (LR)
Max. Pressure (C.I.P.):51,488 psi | 3,550 bar
Barrel Length:24.0" | 610 mm
Min. Twist Rate:Stabilizes in any common twist
Get PRO license to unlock all data and calculators
Community Loads for .444 Marlin + 225gr Barnes XPB
Real loads for this combination shared by our community. Charge weights are only fully visible with an active Pro licence.
| Powder | Charge (gr) | C.O.L. | Barrel Length | Velocity (fps) | Pressure (psi) |
|---|---|---|---|---|---|
| 44.0 gr | 2.540" | 24.0" | 2208 fps | ••• | |
| 43.0 gr | 2.540" | 24.0" | 2254 fps | ••• | |
| 35.5 gr | 2.520" | 23.6" | 2218 fps | ••• | |
Charge weights beyond the first rows and all pressure values are only visible with an active Pro licence.