I've been doing some research on the .416 lately, for a possibly upcoming project.
Here's the comparative data:
Code:
_Bullet_ _BC_ _MV_ 0 400 800 1200 1600 2000 | YARDS
408 1.150 2750 > 0.00 3.77 15.80 37.33 69.84 115.14 | wind (inches)
416 0.943 3250 > 0.00 3.66 15.42 36.74 69.34 115.42 | wind (inches)
416 Light 0.943 3050 > 0.00 3.99 16.89 40.31 76.25 127.21 | wind (inches)
50BMG 1.050 2700 > 0.00 4.26 17.93 42.61 80.22 133.02 | wind (inches)
338LM LH 0.869 3000 > 0.00 4.46 18.99 45.58 86.79 145.78 | wind (inches)
338LM 300SMK 0.77* 2725 > 0.00 5.85 25.21 61.49 119.01 201.29 | wind (inches)
338LM 250SCNR 0.675 2950 > 0.00 6.00 26.03 63.90 124.63 212.63 | wind (inches)
7RM 180 0.684 2900 > 0.00 6.06 26.28 64.47 125.58 213.79 | wind (inches)
308 155 0.508 2900 > 0.00 8.39 37.54 95.45 189.56 317.52 | wind (inches)
408 1.150 2750 > -0.00 1.66 4.70 8.24 12.34 17.12 | drop (mil)
416 0.943 3250 > -0.00 1.09 3.31 5.96 9.12 12.90 | drop (mil)
416 Light 0.943 3050 > -0.00 1.29 3.84 6.89 10.53 14.92 | drop (mil)
50BMG 1.050 2700 > -0.00 1.76 4.98 8.79 13.28 18.62 | drop (mil)
338LM LH 0.869 3000 > -0.00 1.37 4.06 7.35 11.34 16.25 | drop (mil)
338LM 300SMK 0.77* 2725 > -0.00 1.79 5.23 9.58 15.10 22.19 | drop (mil)
338LM 250SCNR 0.675 2950 > -0.00 1.49 4.51 8.44 13.56 20.34 | drop (mil)
7RM 180 0.684 2900 > -0.00 1.55 4.68 8.72 13.99 20.93 | drop (mil)
308 155 0.508 2900 > -0.00 1.65 5.20 10.29 17.65 28.01 | drop (mil)
408 1.150 2750 > 2750 2499 2262 2040 1831 1637 | velocity (fps)
416 0.943 3250 > 3250 2914 2599 2305 2033 1781 | velocity (fps)
416 Light 0.943 3050 > 3050 2727 2424 2143 1883 1642 | velocity (fps)
50BMG 1.050 2700 > 2700 2429 2175 1938 1717 1518 | velocity (fps)
338LM LH 0.869 3000 > 3000 2653 2332 2035 1762 1518 | velocity (fps)
338LM 300SMK 0.77* 2725 > 2725 2357 2018 1708 1439 1226 | velocity (fps)
338LM 250SCNR 0.675 2950 > 2950 2512 2116 1760 1454 1217 | velocity (fps)
7RM 180 0.684 2900 > 2900 2472 2085 1737 1438 1209 | velocity (fps)
308 155 0.508 2900 > 2900 2334 1840 1428 1141 988 | velocity (fps)
408 1.150 2750 > 0.04 -0.16 -0.41 -0.71 -1.08 -1.55 | drop per yard (inches)
416 0.943 3250 > 0.04 -0.11 -0.29 -0.53 -0.82 -1.21 | drop per yard (inches)
416 Light 0.943 3050 > 0.04 -0.13 -0.34 -0.61 -0.95 -1.40 | drop per yard (inches)
50BMG 1.050 2700 > 0.04 -0.17 -0.43 -0.76 -1.18 -1.72 | drop per yard (inches)
338LM LH 0.869 3000 > 0.04 -0.14 -0.36 -0.65 -1.04 -1.57 | drop per yard (inches)
338LM 300SMK 0.77* 2725 > 0.04 -0.17 -0.47 -0.87 -1.44 -2.24 | drop per yard (inches)
338LM 250SCNR 0.675 2950 > 0.04 -0.15 -0.41 -0.79 -1.33 -2.13 | drop per yard (inches)
7RM 180 0.684 2900 > 0.04 -0.15 -0.42 -0.81 -1.37 -2.18 | drop per yard (inches)
308 155 0.508 2900 > 0.04 -0.17 -0.49 -1.03 -1.90 -3.16 | drop per yard (inches)
Over on SnipersHide, there was an anecdote about some extreme long-range shooters not seeing the expected performance from the .416. I don't know if this was a shooter skill, platform (rifle), ammunition, or cartridge issue-- or if it was exaggerated.
What makes the .416 appealing to me is that it drops right into any .50 BMG rifle with a barrel change. That is potentially a lot cheaper and less overall investment than having to build up a dedicated rifle for the caliber.
Bullets are available from Lehigh, with improvements on the Barrett bullet. Right now brass is not available separately from the Barrett loaded ammo, but it's supposed to be available later this year I believe. 50BMG powders should work, but they might not give the "best" velocities vs. custom powders used by ammunition manufacturers. Losing a couple hundred fps from a 3300 fps load is not a big deal.
Assuming you can get an accurate gun and you're up to it, the external ballistics from the computer data certainly support that the .416 has a lot of potential.
With regard to application-- it's even more specialized and expensive than both .50BMG and .338 Lapua. If you want a big caliber blaster, get the .50. There are extremely few shooters who have the opportunity to take advantage of a caliber competent at 1500 yards (like the 338LM) let alone 2000 yards (the 416). So my advice is to carefully weigh the benefits you'll get vs. the cost. We're talking at least 2x the cost of 338LM, probably closer to 4x, to reload match rounds in the .416 vs the 338LM.
I don't have any data on the .375-408, but some numbers I found indicate it might match the MVs of the .416 with a lighter bullet.
-z