The ".338 Lapua Magnum" is a rimless bottleneck shaped cartridge that is designed for use in long range sniper rifles. It was released in 1989 and is still in use today.
There is no .338 Lapua Super Magnum. There is a .338 Lapua Magnum which is considered a member of "Super Magnum family". .338 LM uses several different bullet types and drop will depend on bullet type and weight.
No such caliber. Sorry. If you man the Lapua .338 Magnum, drop will depend on the ballistic coefficient of the bullet being used, it speed, etc.
Depends on muzzle velocity, projectile weight and distance.
A 338 Lapua Magnum bullet typically flies at speeds between 2,800 to 3,000 feet per second (fps) depending on factors such as bullet weight and powder charge.
A .325 WSM should be your smallest, or .308 with AP tip. The Ideal bullet would be a .220 grain ACT Winchester .338. Or a .338 Lapua Magnum
See related links below Clarification: 7.62x51mm, .300 Winchester Magnum, and .338 Lapua Magnum are the most popular.
We'll, a Canadian sniper pulled off a kill at more than 1.5 miles
Oh, dude, like, totally! Browning does make a safari bar that can handle the 338 Lapua round. It's like the perfect match for those big game hunting adventures. So, yeah, if you're into that caliber, Browning's got you covered.
375,000 yards
It's a good caliber, yes.
Most of your normal medium/big game calibres can do it, but, realistically, to be able to shoot at that range with a feasible degree of accuracy and hit probability, you'd be better off getting into cartridges such as the .300 Winchester Magnum, .338 Lapua Magnum, etc.
Your question is a bit ambiguous, so I'll go with the notion you're referring to the longest confirmed kill by a sniper. That was achieved with a rifle chambered in .338 Lapua Magnum.