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The 243 Winchester Super Short Magnum or 243 WSSM is a rifle cartridge introduced in 2003. It uses a .300 WSM ( Winchester Short Magnum ) case shortened and necked down to accept a .243in/6mm diameter bullet, and is a high velocity round based on ballistics design philosophies that are intended to produce a high level of efficiency. [ 2 ]
The cartridge can be extremely accurate to 300 yards (270 m) and beyond, but may not retain enough terminal energy to reliably drop medium game at that distance. [ 4 ] [ 11 ] [ 12 ] Highly experienced hunters use the .243 Winchester to routinely drop bucks up to 250 pounds (110 kg), [ 2 ] while less experienced hunters can be just as capable ...
Finally, there was the added benefit of increased range, as the torpedo traveled a significant distance in the air before entering the water (up to 1,000 yards (910 m) when released at 800 feet (240 m) and 300 mph (480 km/h)). Combined with radar that delivered the exact range to the target, the results proved to be remarkable: [11]
At 2,400 m (2,625 yd) the total drop predictions deviate 47.5 cm (19.7 in) or 0.20 mil (0.68 moa) at 50° latitude and up to 2,700 m (2,953 yd) the total drop predictions are within 0.30 mil (1 moa) at 50° latitude. The 2016 Lapua Ballistics 6 DoF App version predictions were even closer to the Doppler radar test predictions.
Sub 1 minute-of-angle accuracy out to 1,000 yards (910 m) is not unusual in precision-built rifles firing match-grade ammunition. The U.S. government purchased MK 248 MOD 1 .300 Winchester Magnum match-grade ammunition in 2009 for use in adapted M24 Sniper Weapon Systems and other .300 Winchester Magnum sniper rifles like the U.S. Navy Mk.13s .
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Compared to the Winchester's .270 WSM SXP270S ammunition show a bullet drop of 24.5 in (62 cm) but retains 1,552 ft⋅lbf (2,104 J). The N257115BST bullet retains enough energy to be effective on deer out to 550 yd (500 m) while the SXP270S's bullet extends this range out by a further 100 yd (91 m) although both the Weatherby's and Winchester's ...
The trucks were carrying about 25,000 liters of pesticides and 76 tons of sulfuric acid, according to the National Agency for Water and Basic Sanitation, raising concerns about environmental damage.