Loads › .280 Ackley Improved › Federal 155 gr

Federal 155 gr Terminal Ascent

.280 Ackley Improved · 155 gr · Terminal Ascent · #P280AITA1. Maker-published figures, velocity measured in a 24″ barrel. Below: the drop chart, the wind, the energy, and how far it is an ethical hunting load — then shoot it.

Shoot this load through the glass →Hunt with it

G7 BC: 0.300G1 0.586 · G7 0.300
Muzzle velocity: 2,930 fps24″ test barrel · ~22 fps per inch
Muzzle energy: 2,954 ft·lb155 gr at 2,930 fps
Transonic: 1,000+ ydMach 1.2 — where the solver stops being sure
500 yd: 2.5 mil1,583 ft·lb on arrival
Twist: 1:9typical factory twist for the solve

Drop chart · 100 yd zero · 10 mph full-value wind

Range yd	Elev mil	Elev MOA	Drop in	Wind mil	Wind MOA	Wind in	Vel fps	Energy ft·lb	TOF s
50	0.2	0.7	-0.4	0.1	0.2	0.1	2,845	2,785	0.05
100	0.0	0.0	0.0	0.1	0.5	0.5	2,761	2,624	0.11
150	0.1	0.5	-0.8	0.2	0.7	1.1	2,679	2,470	0.16
200	0.4	1.3	-2.8	0.3	1.0	2.0	2,599	2,324	0.22
250	0.7	2.3	-6.0	0.4	1.2	3.2	2,520	2,185	0.28
300	1.0	3.4	-10.7	0.4	1.5	4.7	2,442	2,052	0.34
350	1.3	4.6	-16.8	0.5	1.8	6.6	2,366	1,926	0.40
400	1.7	5.8	-24.4	0.6	2.1	8.7	2,291	1,806	0.46
450	2.1	7.2	-33.7	0.7	2.4	11.2	2,217	1,692	0.53
500	2.5	8.6	-44.8	0.8	2.7	14.0	2,145	1,583	0.60
550	2.9	10.0	-57.8	0.9	3.0	17.3	2,074	1,480	0.67
600	3.4	11.6	-72.8	1.0	3.3	20.9	2,004	1,382	0.74
650	3.8	13.2	-89.9	1.1	3.7	24.9	1,936	1,289	0.82
700	4.3	14.9	-109.4	1.2	4.0	29.4	1,868	1,201	0.90
750	4.9	16.7	-131.3	1.3	4.4	34.3	1,802	1,117	0.98
800	5.4	18.6	-156.0	1.4	4.7	39.8	1,737	1,038	1.06
850	6.0	20.6	-183.5	1.5	5.1	45.7	1,673	963	1.15
900	6.6	22.7	-214.1	1.6	5.5	52.2	1,609	891	1.24
950	7.3	24.9	-248.1	1.7	6.0	59.2	1,547	824	1.34
1000	7.9	27.3	-285.7	1.9	6.4	66.9	1,486	760	1.44

Orange rows are transonic (Mach 1.2–1.0), red subsonic. Elevation is the come-up; wind is the bullet's drift for 10 mph at 90°, so halve it for 5 mph and for a 30° wind. The app builds this for your barrel length, your altitude and today's weather, and lets you true the MV against what you actually hit.

Energy on the animal

Max ethical range, vitals shot

Coyote / varmint1,000 ydKeeps 250 ft·lb and expansion velocity to 1,000 yd.

Pronghorn950 ydKeeps 800 ft·lb and expansion velocity to 950 yd.

Whitetail deer800 ydKeeps 1,000 ft·lb and expansion velocity to 800 yd.

Mule deer800 ydKeeps 1,000 ft·lb and expansion velocity to 800 yd.

Wild hog800 ydKeeps 1,000 ft·lb and expansion velocity to 800 yd.

Black bear700 ydKeeps 1,200 ft·lb and expansion velocity to 700 yd.

Elk500 ydKeeps 1,500 ft·lb and expansion velocity to 500 yd.

Moose500 ydKeeps 1,500 ft·lb and expansion velocity to 500 yd.

Energy floors: Coyote 250 · Pronghorn 800 · Whitetail 1,000 · Mule 1,000 · Wild 1,000 · Black 1,200 · Elk 1,500 · Moose 1,500 ft·lb (see the sources on each animal in the app). Expansion floor from the bullet family's published minimum impact velocity. A bone-breaking shoulder shot wants a bonded, partition or monolithic bullet regardless of energy.

Same cartridge

All .280 Ackley Improved factory loads · best for coyote · best for whitetail · best for wild · best for elk

Source: https://www.federalpremium.com/rifle/terminal-ascent/11-P280AITA1.html · 24" test barrel per Federal rifle FAQ (velocities from 24" barrel "in most cases"); not st