i have been shooting a 50 over 20 years. if long range is where you are shooting and i mean LONG range-like 7 miles, you cannot beat the 50 with those little pipsqueak cartridges. they dont have the powder. all the publicity on the 416 and the shows on tv doesnt take into account of an 50 specialty bullets that can outshine any that you make in the 416. have you ever shot a 50 tracer? ever see how little it drops past 1700 yards? the range on a tracer is 7 miles. that is when it burns out. what the 416 and others dont offer is versatility. my 50 is threaded for a Heavy barrel BMG threads. if i burn out my barrel, i can get the "cheaper" 50 off a ma deuce. i can shoot ANY military ammo including slap, raufus, tracer, and armour piercing incenderary. plus, i can put my own lathe produced bronze ultra high BC bullets into neck turned, competition grade brass for ultra precision if i want, they are out there, just harder to find. basicly, the 50 can do whatever you do with a 416 or whatever and it can be cheaper and a whole lot more options available. my 50 kicks less than a 338 lapua with one of those artillery brakes on it. it shoves 6 inches-no matter who or how it is held, but you can shoot it with one hand and it only weighs 18 pounds, with the scope. hard to find my muzzle brake
tho. freshhour made the first sniper rifles in 50 for the agency back in the 80's before most people even knew that there was such a caliber. his break is still the best on the market, if he is still making them. dont get a clamshell or artillery brake. if you want more info, got tons. they dont shoot 416's out of aircraft. nor 50's too much anymore. 30 mm is the way to go for EXTREME long range. lets face it. more powder the bigger the hole and heavier the bullet at the same velocities the farther you can shoot it. simple physics. if the BC is the same (and you can find bullets like that in the 50 that will surpass the 416) guess which one will shoot farther? do you want a 308 minigun or a 30 mm vulcan for extreme long range. i can tell you what the military is sold on. if you want to quibble on 1000 -2000 yards then my 300 win can almost do as good and it is a heck of lot cheaper to shoot.
good luck and good shooting.