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Example of a ballistic table for a given 7.62×51mm NATO load. Bullet drop and wind drift are shown both in mrad and MOA.. A ballistic table or ballistic chart, also known as the data of previous engagements (DOPE) chart, is a reference data chart used in long-range shooting to predict the trajectory of a projectile and compensate for physical effects of gravity and wind drift, in order to ...
Winchester's factory ammunition for the .300 Winchester Magnum is capable of 990 m/s (3,260 ft/s) with the 150-grain (9.7 g) bullet and 910 m/s (3,000 ft/s) with the 12-gram (180 gr) bullet, however old Western "Power Point" soft point can reach past 1,000 metres per second (3,400 ft/s) with 9.7 g (150 gr) projectiles. The maximum point blank ...
Load Index (LI) kg lbs Load Index (LI) kg lbs Load Index (LI) kg lbs 25: 92.5 204 125: 1650 3638 225: 29000 63900 26: 95 209 126: 1700 3748 226: 30000 66100 27: 97.5 215 127: 1750 3858 227: 30750 67800 28: 100 220 128: 1800 3968 228: 31500 69400 29: 103 227 129: 1850 4079 229: 32500 71700 30: 106 234 130: 1900 4189 230: 33500 73900 31: 109 240 ...
The .300 WSM also head-spaces off of the case shoulder, versus the older .300 Winchester Magnum's belted head space design. The advantage to this round is the ballistic performance is nearly identical to the .300 Winchester Magnum [ 2 ] in a lighter rifle with a shorter action burning 8 - 10% less gunpowder.
62 grains for the 235-gr bullet, yielding a listed 2,800 feet per second; 61 grains for the 270-gr bullet, yielding a listed 2,650 feet per second; 58 grains for the 300-gr bullet, yielding a listed 2,500 feet per second [10] The new cartridge was a proprietary design unlike the 9.3×62mm and was considerably longer than its German counterpart.
Conversion from kilo grain feet per second to newton-seconds is trivial, since both the grain and foot is based on SI units. One troy grain is defined as 0.064 798 91 grams exactly [ 1 ] and one international foot is defined as 0.3048 meters , giving the exact conversion factor of 0.019 750 707 768 .
The cartridge delivers accurate (sub-MOA) performance from a sniper rifle. The Lost River Ballistic Technologies/Jamison International 419-grain (26.95 g) very-low-drag bullet is the standard, long-range sniping load. Lost River Ballistic Technologies also designed a 305 grain (19.76 g) bullet for the Battlefield Domination Round (BDR).
The 7mm-08 with 139-140 grain loads does well against some 150-grain .308 Win. loads, providing good energy levels. One example is the Remington 7mm-08 140 PSP (1490 fpe at 300 yards) compared with the Remington 308 150 grain PSP (1344 fpe at 300 yards). [14] The 7mm-08 invites a ballistic comparison with the veteran, highly esteemed 7×57mm ...