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How Accurate Is Our Ballistic Engine?

Audit date: July 6, 2026. We tested our G1 trajectory engine against manufacturer-published drop tables at identical inputs (published muzzle velocity and BC, the table's stated zero, 1.5" sight height, standard atmosphere). Across 8 supersonic centerfire loads from Federal, Hornady, Remington, and Winchester (BC .314–.646), predicted drop matches the published tables within about 0.15 MOA out to 500 yards. The drag calibration was fitted on four Federal/Hornady tables and validated out-of-sample on the rest. Rimfire (.22 LR) lives in the transonic zone where every G1 model is weakest; its deviations (up to ~0.5 MOA inside 100 yards) are shown below rather than hidden. Note that manufacturer tables are themselves calculated from chronographed velocities and published BCs — this comparison proves our solver agrees with the industry references; your rifle will still differ from any table, which is what the range card builder's DOPE truing is for.

Federal GM308M .308 168gr SMK

2650 fps · G1 BC 0.462 · 200 yd zero · source: federalpremium.com GM308M

Range	Published drop	Our prediction	Deviation	Velocity (pub / ours)
100 yd	+2.1"	+2.1"	+0.04 MOA	2460 / 2457
300 yd	-8.9"	-8.9"	+0.00 MOA	2103 / 2100
400 yd	-25.5"	-25.7"	-0.05 MOA	—
500 yd	-51.5"	-51.8"	-0.06 MOA	1778 / 1774

Federal GM308M (100yd zero)

2650 fps · G1 BC 0.462 · 100 yd zero · source: federalpremium.com GM308M

Range	Published drop	Our prediction	Deviation	Velocity (pub / ours)
200 yd	-4.3"	-4.3"	+0.02 MOA	—
300 yd	-15.3"	-15.3"	+0.01 MOA	—

Hornady Match .308 168gr ELD-M

2700 fps · G1 BC 0.523 · 200 yd zero · source: hornady.com 80966

Range	Published drop	Our prediction	Deviation	Velocity (pub / ours)
100 yd	+2"	+2.0"	-0.02 MOA	2530 / 2528
300 yd	-8.2"	-8.2"	-0.01 MOA	2209 / 2204
400 yd	-23.5"	-23.6"	-0.03 MOA	—
500 yd	-47.1"	-47.3"	-0.03 MOA	1912 / 1907

Hornady 6.5 CM 140gr ELD-M

2710 fps · G1 BC 0.646 · 200 yd zero · source: hornady.com 81500

Range	Published drop	Our prediction	Deviation	Velocity (pub / ours)
100 yd	+1.9"	+1.9"	-0.01 MOA	2564 / 2569
300 yd	-7.8"	-7.8"	+0.02 MOA	2285 / 2303
400 yd	-22.3"	-22.1"	+0.05 MOA	—
500 yd	-44.4"	-43.8"	+0.12 MOA	2023 / 2054

Federal Power-Shok 30-06 180gr

2700 fps · G1 BC 0.385 · 200 yd zero · source: federalpremium.com 3006B

Range	Published drop	Our prediction	Deviation	Velocity (pub / ours)
100 yd	+2.1"	+2.1"	+0.02 MOA	2470 / 2467
300 yd	-9"	-9.0"	-0.01 MOA	2045 / 2041
400 yd	-26.2"	-26.4"	-0.05 MOA	—
500 yd	-54"	-54.0"	-0.01 MOA	1667 / 1658

Remington Core-Lokt 30-06 150gr

2910 fps · G1 BC 0.314 · 200 yd zero · source: remington.com R30061

Range	Published drop	Our prediction	Deviation	Velocity (pub / ours)
100 yd	+1.8"	+1.8"	+0.01 MOA	2617 / 2614
300 yd	-8.2"	-8.2"	+0.00 MOA	2083 / 2079
400 yd	-24.3"	-24.5"	-0.05 MOA	—
500 yd	-51.2"	-51.2"	+0.01 MOA	1622 / 1610

Winchester Super-X .270 130gr

3060 fps · G1 BC 0.372 · 200 yd zero · source: Winchester Super-X catalog

Range	Published drop	Our prediction	Deviation	Velocity (pub / ours)
100 yd	+1.8"	+1.5"	-0.31 MOA	2802 / 2802
300 yd	-7.1"	-6.8"	+0.09 MOA	2329 / 2324
400 yd	-20.6"	-20.1"	+0.13 MOA	—
500 yd	-42"	-41.2"	+0.15 MOA	1904 / 1900

Hornady PH 7mm RM 162gr ELD-X

2975 fps · G1 BC 0.631 · 200 yd zero · source: hornady.com 80636

Range	Published drop	Our prediction	Deviation	Velocity (pub / ours)
100 yd	+1.4"	+1.4"	+0.04 MOA	2827 / 2823
300 yd	-6.3"	-6.3"	+0.01 MOA	2542 / 2534
400 yd	-17.9"	-18.0"	-0.03 MOA	—
500 yd	-35.6"	-35.8"	-0.03 MOA	2274 / 2264

CCI Mini-Mag .22 LR 40gr (rimfire)

1235 fps · G1 BC 0.13 · 100 yd zero · source: cci-ammunition.com 0030

Range	Published drop	Our prediction	Deviation	Velocity (pub / ours)
25 yd	+1.5"	+1.7"	+0.65 MOA	—
50 yd	+2.9"	+3.1"	+0.48 MOA	1092 / 1055
75 yd	+2.4"	+2.7"	+0.33 MOA	—

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