Underwood .45 Colt 255gr LSWCGC Ballistics
Nickel-Plated Brass Case • LSWCGC • MPN: 725
Underwood .45 Colt 255gr LSWCGC Ballistics
Nickel-Plated Brass Case • LSWCGC • MPN: 725
Solved from this product's advertised 1000 fps, 255gr bullet and G1 BC 0.120, with the sight 0.5" over the bore at standard conditions. Compare every zero for .45 Colt.
How to read it: filled circles are the near and far zero, where the bullet's path crosses the line of sight;the triangle is the peak (max ordinate). The shaded band is the 4" vital zone, ±2" either side of the line of sight. The dashed line marks the edge of the hold-dead-on window. The chart is zoomed to where the zero matters; the tables below run to 100 yards.
.45 Colt 255gr with a 10-yard zero
Zeroed at 10 yards with a 0.5" sight height, this load crosses the line of sight on the way up at 10 yards, peaks +0.1" at 18 yards, crosses back down at 27 yards, and is -1.8" at 50 and -13.2" at 100 yards.
| Range (yd) | Drop (in) | Drop (MOA) | Drop (MIL) | Velocity (fps) | Energy (ft-lb) | Wind drift, 10 mph (in) |
|---|---|---|---|---|---|---|
| 0 | -0.5" | 0.00 | 0.00 | 1,000 | 566 | 0.1 |
| 5 | -0.2" | -3.75 | -1.09 | 991 | 556 | 0.1 |
| 10 | 0.0" | -0.05 | -0.02 | 983 | 547 | 0.1 |
| 15 | +0.1" | +0.64 | +0.19 | 975 | 539 | 0.2 |
| 20 | +0.1" | +0.56 | +0.16 | 967 | 530 | 0.3 |
| 25 | 0.0" | +0.16 | +0.05 | 960 | 522 | 0.4 |
| 30 | -0.1" | -0.41 | -0.12 | 953 | 514 | 0.5 |
| 35 | -0.4" | -1.07 | -0.31 | 946 | 506 | 0.6 |
| 40 | -0.8" | -1.81 | -0.53 | 939 | 499 | 0.8 |
| 45 | -1.2" | -2.58 | -0.75 | 932 | 492 | 1.0 |
| 50 | -1.8" | -3.40 | -0.99 | 926 | 485 | 1.2 |
| 55 | -2.5" | -4.24 | -1.23 | 919 | 478 | 1.4 |
| 60 | -3.2" | -5.10 | -1.48 | 913 | 472 | 1.7 |
| 65 | -4.1" | -5.99 | -1.74 | 907 | 466 | 1.9 |
| 70 | -5.1" | -6.89 | -2.00 | 901 | 459 | 2.2 |
| 75 | -6.1" | -7.81 | -2.27 | 895 | 453 | 2.5 |
| 80 | -7.3" | -8.74 | -2.54 | 889 | 448 | 2.8 |
| 85 | -8.6" | -9.69 | -2.82 | 883 | 442 | 3.2 |
| 90 | -10.1" | -10.65 | -3.10 | 878 | 436 | 3.5 |
| 95 | -11.6" | -11.62 | -3.38 | 872 | 431 | 3.9 |
| 100 | -13.2" | -12.60 | -3.67 | 867 | 426 | 4.3 |
255gr G1 .120 at 1,000 fps, 0.5" sight height over bore, standard conditions (59°F, sea level), 10 mph full-value crosswind. Positive drop is above the line of sight. This load is subsonic from the muzzle, so there is no transonic zone to cross. Source: Manufacturer's advertised velocity and BC.
.45 Colt 255gr with a 15-yard zero
Zeroed at 15 yards with a 0.5" sight height, this load touches the line of sight at 15 yards without ever climbing above it (a tangent zero), and is -2.1" at 50 and -13.9" at 100 yards.
| Range (yd) | Drop (in) | Drop (MOA) | Drop (MIL) | Velocity (fps) | Energy (ft-lb) | Wind drift, 10 mph (in) |
|---|---|---|---|---|---|---|
| 0 | -0.5" | 0.00 | 0.00 | 1,000 | 566 | 0.1 |
| 5 | -0.2" | -4.41 | -1.28 | 991 | 556 | 0.1 |
| 10 | -0.1" | -0.71 | -0.21 | 983 | 547 | 0.1 |
| 15 | 0.0" | -0.01 | 0.00 | 975 | 539 | 0.2 |
| 20 | 0.0" | -0.09 | -0.03 | 967 | 530 | 0.3 |
| 25 | -0.1" | -0.50 | -0.14 | 960 | 522 | 0.4 |
| 30 | -0.3" | -1.06 | -0.31 | 953 | 514 | 0.5 |
| 35 | -0.6" | -1.73 | -0.50 | 946 | 506 | 0.6 |
| 40 | -1.0" | -2.46 | -0.72 | 939 | 499 | 0.8 |
| 45 | -1.5" | -3.24 | -0.94 | 932 | 492 | 1.0 |
| 50 | -2.1" | -4.05 | -1.18 | 926 | 485 | 1.2 |
| 55 | -2.8" | -4.89 | -1.42 | 919 | 478 | 1.4 |
| 60 | -3.6" | -5.75 | -1.67 | 913 | 472 | 1.7 |
| 65 | -4.5" | -6.64 | -1.93 | 907 | 466 | 1.9 |
| 70 | -5.5" | -7.54 | -2.19 | 901 | 459 | 2.2 |
| 75 | -6.7" | -8.46 | -2.46 | 895 | 453 | 2.5 |
| 80 | -7.9" | -9.39 | -2.73 | 889 | 448 | 2.8 |
| 85 | -9.2" | -10.34 | -3.01 | 883 | 442 | 3.2 |
| 90 | -10.7" | -11.30 | -3.29 | 878 | 436 | 3.5 |
| 95 | -12.2" | -12.27 | -3.57 | 872 | 431 | 3.9 |
| 100 | -13.9" | -13.25 | -3.86 | 867 | 426 | 4.3 |
255gr G1 .120 at 1,000 fps, 0.5" sight height over bore, standard conditions (59°F, sea level), 10 mph full-value crosswind. Positive drop is above the line of sight. This load is subsonic from the muzzle, so there is no transonic zone to cross. Source: Manufacturer's advertised velocity and BC.
.45 Colt 255gr with a 25-yard zero
Zeroed at 25 yards with a 0.5" sight height, this load first crosses the line of sight at 11 yards, peaks +0.1" at 18 yards, returns to zero at 25, and is -1.9" at 50 and -13.4" at 100 yards.
| Range (yd) | Drop (in) | Drop (MOA) | Drop (MIL) | Velocity (fps) | Energy (ft-lb) | Wind drift, 10 mph (in) |
|---|---|---|---|---|---|---|
| 0 | -0.5" | 0.00 | 0.00 | 1,000 | 566 | 0.1 |
| 5 | -0.2" | -3.89 | -1.13 | 991 | 556 | 0.1 |
| 10 | 0.0" | -0.19 | -0.06 | 983 | 547 | 0.1 |
| 15 | +0.1" | +0.50 | +0.15 | 975 | 539 | 0.2 |
| 20 | +0.1" | +0.42 | +0.12 | 967 | 530 | 0.3 |
| 25 | 0.0" | +0.02 | +0.01 | 960 | 522 | 0.4 |
| 30 | -0.2" | -0.55 | -0.16 | 953 | 514 | 0.5 |
| 35 | -0.5" | -1.22 | -0.35 | 946 | 506 | 0.6 |
| 40 | -0.8" | -1.95 | -0.57 | 939 | 499 | 0.8 |
| 45 | -1.3" | -2.72 | -0.79 | 932 | 492 | 1.0 |
| 50 | -1.9" | -3.54 | -1.03 | 926 | 485 | 1.2 |
| 55 | -2.5" | -4.38 | -1.27 | 919 | 478 | 1.4 |
| 60 | -3.3" | -5.24 | -1.52 | 913 | 472 | 1.7 |
| 65 | -4.2" | -6.13 | -1.78 | 907 | 466 | 1.9 |
| 70 | -5.2" | -7.03 | -2.04 | 901 | 459 | 2.2 |
| 75 | -6.3" | -7.95 | -2.31 | 895 | 453 | 2.5 |
| 80 | -7.5" | -8.88 | -2.58 | 889 | 448 | 2.8 |
| 85 | -8.8" | -9.83 | -2.86 | 883 | 442 | 3.2 |
| 90 | -10.2" | -10.79 | -3.14 | 878 | 436 | 3.5 |
| 95 | -11.7" | -11.76 | -3.42 | 872 | 431 | 3.9 |
| 100 | -13.4" | -12.74 | -3.71 | 867 | 426 | 4.3 |
255gr G1 .120 at 1,000 fps, 0.5" sight height over bore, standard conditions (59°F, sea level), 10 mph full-value crosswind. Positive drop is above the line of sight. This load is subsonic from the muzzle, so there is no transonic zone to cross. Source: Manufacturer's advertised velocity and BC.
Product Overview
Underwood 255-grain LSWCGC is a hard cast semi-wadcutter .45 Colt load made for hunting medium and large game. Underwood fits the Keith-type bullet with a gas check at its base. At 1,000 fps it makes 566 ft-lbs.
From a 25-yard zero it is 1.9 inches low at 50, still carrying 926 fps and 485 ft-lbs there. Its estimated recoil of 15.6 ft-lbs in the same revolver is well over double that of Atomic 200-grain LRNFP.
If you're cross-shopping, Fiocchi Cowboy Action 250-grain is 250 fps slower with 254 ft-lbs less at the muzzle. Black Hills 250-grain RNFP is 275 fps slower with 292 ft-lbs.
- The most muzzle energy of the loads compared by a wide margin
- Nickel-plated brass, where the lead loads compared use plain brass
- A gas check at the base, which the plain lead loads compared do not have
- Exposed lead at the nose, which some ranges ban
- The heaviest recoil of the loads compared, so a cowboy match with it would be a long day
- Fiocchi Cowboy Action 250-grain is the load for high-round-count practice at this bullet weight
Similar Products Compared
| PRODUCT | WEIGHT | TYPE | VELOCITY | ENERGY | BC | PRICE/RD |
|---|---|---|---|---|---|---|
| 255 gr | LSWCGC | 1000 fps | 566 ft-lbs | 0.12 | N/A | |
| 250 gr | RNFP | 725 fps | 292 ft-lbs | 0.14 | N/A | |
| 250 gr | LRNFP | 750 fps | 312 ft-lbs | 0.14 |
$1.05
400 Rounds
|
|
| 200 gr | LRNFP | 800 fps | 284 ft-lbs | 0.125 | N/A |
All Underwood .45 Colt 255gr LSWCGC Prices
| DEALER | QTY | PRICE | SHIPPING | TOTAL | PRICE/RD |
|---|
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