View Full Version : The Tyrannosaur?

February 12, 2000, 02:46 AM
Anyone here know of any makes and models of rifles for the 577 Tyrannosaur?

For those who dont' know (and that included me until just a short while ago) the Tyrannosaur is a .577 caliber rifle cartidge with a 750 grain bullet. About 2400 fps.

Anyone ever shot this round? How much recoil did it generate? (and in what gun?)

Art Eatman
February 12, 2000, 12:16 PM
A 750-grain bullet at 2,400 ft/sec? That's about 1/9th of a pound of bullet, for starters. Anyway, about 3-1/2 times the recoil of an '06 with a 220-grain bullet.

For any "launcher" of under 10 pounds, I'd guess the recoil is in the range of "MEDIC!"

:), Art

February 12, 2000, 05:34 PM
A-Square (Col. Art Alpin) is the inventor, sole ammo producer and maker of rifles for this cartridge, which is supposed to be the most powerful bolt action round in existance.
See A-square's loading manual, Any Shot You Want (1996), for more information on this cartridge.
I am assuming that A-Square is still in business.

February 12, 2000, 05:40 PM
Oh, just remembered: rifle, ammo, dies, accessories, etc. will probably cost you $5,000 plus. This is cheap only when compared to the cost of big double rifles.

Stephen A. Camp
February 12, 2000, 07:08 PM
Hello. Yes, I have shot a .577 A Square Tyranosaurus in an A Square bolt gun built on the P17 action. The gun does not belong to me but to a dangerous game hunter buddy. Recoil is severe and you must have a solid grip on the rifle and be prepared for it. You can truly say that you've "been to the mountain" in terms of recoil. There is also considerable torque when firing this rifle. Having said all of this, the gun is NOT painful; it merely rocks you and pushes you back very significantly. The muzzle will be at approx 65 or 70 degrees when you bring it down from recoil. I have shot lightweight rifles in faster but smaller diameter calibers that hurt me. This would didn't hurt me, but it darn sure could if not careful. It is capable of taking anything on earth in my opinion. Ammo is something like $16 per shot if I remember right. The rifle's owner, a skilled bolt man, can rapid fire the thing at bowling pins set up to duplicate a charge, ie: one at 50 yards, one at 30 and one at about 15 yards. You then shoot the farthest pin first, and work your way in as though tracking a beast charging you. He can rapid fire the gun and load, hitting the pins each time. I am slower. Recoil seems more than 3 times an '06 and is awesome. My .416 is much more pleasent. The owner of the .577 much prefers the .500 A Square in that the .577 is right on the edge of what he can control. best to all.

February 13, 2000, 09:16 AM
As a lemon stimulates my salivary glands so does my shoulder hurt just reading about this thing. At $16. a round I guess you want it to be memorable though.
I don't need it :D


September 20, 2000, 11:06 AM
tyranosaur kick: http://www.jps.net/badzorak/Recoil.mpeg

September 20, 2000, 12:49 PM
There are more T Rex videos to be seen at http://www.accuratereloading.com. Link to Humor and Videos, and then Videos, and pray that you don't have friends like the guys who own the T Rex and took these videos.

September 20, 2000, 01:47 PM
Those videos brought tears to my eyes. Funny stuff.


Jeff, CA
September 20, 2000, 02:11 PM
Oh, my Lord...

Only one guy was able to even hold on to the thing. Did it look like the gun hit and broke the booth glass :eek: in one video?

As Jeff Cooper said, this rifle should properly be called the ".577 Dundee", as its main purpose is so you can say, "That's not a rifle. THIS is a rifle!"

Mike Irwin
September 20, 2000, 05:09 PM
Almost 9,500 foot pounds of energy at the muzzle.

We're getting VERY close to .50 BMG ballistics, folks.

Do these rifles have muzzlebrakes on them?

If not, they should.

Beware the man with the S&W .357 Mag.
Chances are he knows how to use it.

Stephen A. Camp
September 20, 2000, 07:55 PM
Hello. The one A-Square I fired did NOT have a break on it. Best.

September 21, 2000, 12:16 PM
Wow! :eek: That's some recoil. Does A-Square
have a website?

September 21, 2000, 01:13 PM

September 21, 2000, 02:16 PM
Damned hard to get off a second shot while laying in the grass with a broken shoulder. Anyone have any info on what these things weigh?

September 21, 2000, 04:59 PM
I'm ythinking they will have to sell that one as a "scratch and dent" demo model.

Some people have more money and bravado than sense.

Funny stuff


Stephen A. Camp
September 21, 2000, 07:36 PM
Hello. I suspect that the guy in the video was not at all ready for the recoil. The time I fired one, I leaned into it...a lot.

The fellow who owns and hunts with that rifle in Africa set up a test to represent a charging animal. A bowling pin was set up at 50 yards, another at 25 yards, and the last at about 10 yards. The idea was to shoot the pin at 50 yards and as quickly as possible hit the one at 25 and then the one at 10. He did it rather quickly, never taking the rifle from his shoulder. He did not want to do it again, however.

I don't recall for sure what the rifles weight, but I think it's around 10lbs.


Mitch. C
September 30, 2000, 04:16 AM
I own a custom built 577 Tyrannosaur. My rifle is built on a BBK-02 action and has an MPI classic style stock, my rifle has a KDF muzzle brake that makes it easier to shoot accurately. The A-square factory load is rated at 2460 fps. with a 750 gr. bullet,and costs $140.00 for a wallet of 10 rounds. This load gives a bit over 10,000 ft lbs. of energy. I have been able to hit 2608 fps. with my rifle with a 750 gr. bullet for 11,300 ft. lbs. of energy by using different powder and bullets than what A-Square used in their tests. You can checkout my loading data and Saeeds data on this cartridge in the reloading section at www.accuratereloading.com. (http://www.accuratereloading.com.) Saeed was able to achieve 2581 fps. with his 577 Tyrannosaur for just over 11,000 ft. lbs. of energy. His rifle has a 23 inch barrel mine has a 26 inch barrel. I think this a great cartridge if the rifle is built to the proper weight, my rifle weighs 14.3 lbs. Recoil is heavy but manageable. To be sure it is not a cartridge for everyone, but for those who can handle it . It is a great cartridge.

September 30, 2000, 08:25 AM
Hey Mitch!

welcome to the firingline!

doc Zox

September 30, 2000, 09:06 AM
Dr. Rob, That would be a "scratch and dent" model for sure even though its very low mileage. I guess for the apparent cost of ammo you want your shots to be memorable though. The pain of it all came right through my monitor. YEEOOWWW!

"In my opinion, anyone pushing through anti-gun legislation is a bloody traitor and should be sent up for treason" N.H. Stuart

September 30, 2000, 03:07 PM
All I can say is.....NO THANKS!!

Those videos were hilarious, and give some serious creedence to the power of the cartridge. Talk about a car stopper. Imagine all the Koreans during the riots in LA with these things... :)
I'll stick with mild loadings that I can handle...
.308 and below, please... :)

Does anyone else have any more gun videos like these. They were excellent, esp. the hunting ones.

Mitch. C
September 30, 2000, 04:06 PM
DZ, thanks for the welcome.

September 30, 2000, 10:35 PM
<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by dZ:
tyranosaur kick: http://www.jps.net/badzorak/Recoil.mpeg [/quote]

whats funny is the arabic guys reaction and the unseen dude running around saying f*ck! over and over again.

makes my shoulder hurt watching it, but i want to try one hehehehehhe.