You, a single-shot 50cal rifle, and an angry T-Rex. Hope?

Not so much. Before the 90s, the record sniper shots were from a M-60, largely due to the mass of the gun and barrel, and stability of the bullet in flight. They may also put holes in vehicles, but they make most excellent sniper rifles.

The T-Rex dies every time. Assuming the terrible lizard is running me down, I’d aim for the center of the roughly two foot area under the lower jaw and above the arms. T-Rex had a much more horizontal posture than what a lot of people picture. That shot would likely fatally damage its heart and lungs, and will effectively blows its guts out of its ass.

Screw the T-Rex, what if you were facing down an angry Spinosaurus!

And props to Ura-Maru. Gave me a chuckle.

M-60? Machinegun? I’ll have to ask for a cite for that.

U.S. Marine Corps Gunnery Sgt. Carlos Hathcock modified a M-2 .50 cal machinegun for single-shot use in Vietnam, but I’ve never heard of an M-60 being used as a sniper rifle.

There’s an M-40 sniper rifle, an M-24, and an older M-21 based on the M-14 rifle. In .50 cal, there’s the Army’s M-107 (M-82 civilian designation), which may also be in use with various Spec. Force units.

Do we know that a T-Rex will quickly recognize a person as food? A person smells like mammal sweat (and not even wild mammal sweat) and perfumed soap/detergent/deodorant. Did T-Rexes even hunt mammals? Even after you take your shot, will the T-Rex identify you as its attacker? If the T-Rex can’t figure out that he’s in a fight do the death with you, you’ll have time to line up your shot and wait for it to bleed out if necessary.

Since the OP says you’re in Hell’s Colosseum, I would presume they keep the T-Rex hungry and threw a few hairless monkeys into it’s pen until it got the idea. (Animals are pretty smart when it comes to eating.)

Dunno about the logistics of the 50cal, but I recently spent time in a famous T. Rex’s mouth. This seems like a good place to share the proof: The best viewpoint in Cabazon, CA

Brain does not have to be engaged whilst keyboard in motion. Yes, I meant the Browning M2. I get them backwards constantly, no idea why. I’m pretty sure, in fact, if you look hard enough, you’d catch me doing exactly this at some point in the past, and you correcting me. And then I remember being corrected and, if I have it right, I swap them backwards because I know I was wrong the last time and… anyhow.

A .30-06 bullet will go a lot farther than 1000 yards- pretty much any centrefire cartridge of that era can shoot to that sort of range. The as-issued sights on SMLE Mk III rifles go to 2,000 yards and whilst it’s unrealistic to expect accurate, aimed fire at that range it is (theoretically) possible, albeit highly unlikely. And if you add the Volley Sights on the earlier models into the equation, the (unaimed but still directed fire) range goes up towards 3,000 yards or so.

FWIW, my 1929 Textbook Of Small Arms (Published by the British Government) has range tables for .303 Mk VII ammunition, with the maximum noted range being 3,000 yards, by which stage the projectile velocity is 300 ft/s. At 2000 yards, the velocity is listed as 600 ft/s.

Do I have to kill it or just incapacitate it? Do I have the option to shoot the guy who locked me in the coliseum instead?

Depending on the answer to the above 2 questions, I’d aim for the eye of either the t-rex or the jailer.

double post

With the amount of energy a .50 cal can put on the target, I’d think that a head-shot would likely be fatal even if you don’t hit the brain with the bullet. Wouldn’t there be a lot of bone shrapnel flying around the head cavity? At the very least, I’d think there would be spalling of bits of interior bone as the bullet passes through. Also, assuming the head is full of some kind of tissue, i would imagine hydrostatic shock would not be helpful to the Dino.

Wait until he lowers his head to smell or something, then shoot him right between the eyes, aiming to hit the spine at the back of the head. So long as you hit that spot, I think Dino’s toast.

Bah I’m not a very big morsal for it. Run like hell and make myself not worth the chase, keep the gun as plan b. Ideally find something sturdy to hide under.

"I think we’re all beginning to lose sight of the real issue here, which is “What are we going to call ourselves?” and I think it comes down to a choice between The League Against Salivating Monsters' or my own personal preference, which is The Committee for the Liberation and Integration of Terrifying Organisms and their Rehabilitation Into Society’. Um, one drawback with that… the abbreviation is `CLITORIS’.

The time for talking is over. Now call it extreme if you like, but I propose we hit it hard, and we hit it fast, with a major, and I mean major, leaflet campaign."

let’s just put that on the back-burner for now shall we?

Those of you Rangers who can’t shoot (?!?) just try to stay between his legs and tail. You may well get pooped on, but he likely won’t ever find you. In fact, once you do get pooped on, it may be safe to lay down and rest against a wall or soemthing, as then you won’t smell appetizing.

Tie his shoe-laces together, that’ll learn him.

You do know don’t you that the .50 caliber rifle is deployed on a bipod and fired from a prone position like a light machine gun? Oh I suppose you could fire one shot from the shoulder, completely knocking you on your ass.

Didn’t they bring down elephants by cutting their Achilles tendon? How about a devastating shot at the place where that tendon joins the T-rex’ heel – a readily visible, relatively small, and unshielded target? Mr. T-rex may not die quickly, but he ain’t going anywhere in the meantime.

It’s not unshielded - it’s on the back of the T-rex’s foot. That means that there’s a legbone built to carry seven tons of T-rex between you and it.