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Shooting & Reloading - Mausers, Big Bores and others >> Big Bore Rifles

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vikram
.300 member

Reged: 29/07/04
Posts: 105
Loc: Warwickshire,England

.577 T-Rex- , genesis,makers, Ballistics etc
#42767 - 02/12/05 12:22 PM

Gentlemen,

Of late, my interest in this cartridge has reached a high.I would greatly appreciate it if you could provide this information for me.

1.Origin,design of this cartridge
2.Makers and models of the rifles - Bolt action, double rifles etc
3.Price
4.Ballistics in comparison

If you can post a few pics it would be great.Your experiences, Links,too.

Thanks in advance.
Best-
Vikram
Pee Yess: I have seen all the videos on AR.

--------------------
"Routine is death to Heroism."- P.G.Wodehouse

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Gibbs505
.333 member

Reged: 09/08/03
Posts: 442
Loc: BC, Canada

Re: .577 T-Rex- , genesis,makers, Ballistics etc [Re: vikram]
#42781 - 02/12/05 03:30 PM

Well, it is in my 1993 edition of "Cartridges of the World", where it is noted that it was concived by Ross Seyfried. Apparently, Ross had a argurment with a elephant and he found his 450 NE inadequate! No shoots were fired but Ross felt he needed something with more oomph!

Which gunmaker helped develop the cartridge is not stated however Asquare did market both the cartridge and rifles chambered for it! There are no specs in "Cartridges" but ballistics noted are:
Bullet Powder MV ME
750sp IMR4350/135 2040 6930 fpe
" " 140 2170 7845 "
" " 140 2195 8035 "
" " 160 2490 10,305 "
" RL-15/130 2235 8320 "
" " 2525 10,625 "
650sp IMR4350/160 2400 8330 "
650lead H4198/73 1660 3980 "

All loads per Ross Seyfried and used at your own risk.

--------------------
So I can't spell, so what?

Those who beat their swords into ploughshares, will plough for those who don't!

Those who fail to learn from history will be doomed to repeat it

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500grains
.416 member

Reged: 16/02/04
Posts: 4732
Loc: Salt Lake City, Utah USA

Re: .577 T-Rex- , genesis,makers, Ballistics etc [Re: Gibbs505]
#42788 - 02/12/05 03:55 PM

The .577 T Rex was designed by Art Alphin of the A-Square Company. You can find out everything about it plus a lot of other great info in the A-Square reloading manual entitled "Any Shot You Want" which is available from www.amazon.com or www.alibris.com

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**DONOTDELETE**

Re: .577 T-Rex- , genesis,makers, Ballistics etc [Re: Gibbs505]
#42822 - 03/12/05 12:23 AM

Gibbs505,

I thought that was the 585 Nyati. I get confused rather easily though.

I remember it the way Dan (500grains) says it. Then again my memory ain't so good anymore either it would seem.

Scott

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clark7781
.375 member

Reged: 28/10/04
Posts: 612
Loc: Fairfax County, Virginia, USA

Re: .577 T-Rex- , genesis,makers, Ballistics etc [Re: vikram]
#42863 - 03/12/05 06:16 AM

Vikram:

Go onto www.accuratereloading.com and watch some of Saeed's "heros" shooting the .577 TRex.

--------------------
Clark

Double Rifle Shooters Society
.500 NE and .577 NE

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Gibbs505
.333 member

Reged: 09/08/03
Posts: 442
Loc: BC, Canada

Re: .577 T-Rex- , genesis,makers, Ballistics etc [Re: ScottS]
#42878 - 03/12/05 10:34 AM

In reply to:

Gibbs505,

I thought that was the 585 Nyati. I get confused rather easily though.

I remember it the way Dan (500grains) says it. Then again my memory ain't so good anymore either it would seem.

Scott

They are both the same bullet. .585 is the grove diameter and .577 the land diameter! There may be some minor differences in the brass. I do not know as there were no specs on the brass given. I rember reading that Ross went to ASquare to get the rifle made!

However I am not sure!

--------------------
So I can't spell, so what?

Those who beat their swords into ploughshares, will plough for those who don't!

Those who fail to learn from history will be doomed to repeat it

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vikram
.300 member

Reged: 29/07/04
Posts: 105
Loc: Warwickshire,England

Re: .577 T-Rex- , genesis,makers, Ballistics etc [Re: vikram]
#42890 - 03/12/05 12:02 PM

Thank you gentlemen.I watched and downloaded all the T-Rex clips on AR.I would love to try that monster one day.

Can any of you Post a few pics of that cartridge and the rifle, if you have any?

Thanks once again.

Best-
Vikram.

--------------------
"Routine is death to Heroism."- P.G.Wodehouse

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Marrakai
.416 member

Reged: 09/01/03
Posts: 3563
Loc: Darwin, Top End of Australia

Re: .577 T-Rex- , genesis,makers, Ballistics etc [Re: vikram]
#42895 - 03/12/05 01:21 PM

FYI, Seyfried's article introducing the .585 Nyati is in the December 1991 edition of G&A, commencing at page 56.

--------------------
Marrakai
When the bull drops, the bullshit stops!
--------------------------------
www.marrakai-adventure.com.au

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KennethI
.224 member

Reged: 08/09/05
Posts: 17
Loc: Southern California

Re: .577 T-Rex- , genesis,makers, Ballistics etc [Re: vikram]
#42912 - 03/12/05 07:03 PM

Have you looked at 500Grains's article? In it, you can find additional information and a comparison photo. For more pictures, Midwayusa has a close up picture of the brass. Also, there is a seller on Gunbroker right now selling a dummy round with a photo comparing the .577 Tyrannosaur to a 30-06. Hope this helps.

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500grains
.416 member

Reged: 16/02/04
Posts: 4732
Loc: Salt Lake City, Utah USA

Re: .577 T-Rex- , genesis,makers, Ballistics etc [Re: KennethI]
#42919 - 04/12/05 12:21 AM

Gibbs505, the .585 Nyati was developed my Mr. Ross Seyfried. The 577 Tyrannosaur was developed by Mr. Art Alphin of A-Square. They are indeed different cartridges which start from different cases entirely. But they use the same bullet. Kind of like 30-06 versus 300 win mag.

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Gibbs505
.333 member

Reged: 09/08/03
Posts: 442
Loc: BC, Canada

Re: .577 T-Rex- , genesis,makers, Ballistics etc [Re: 500grains]
#42940 - 04/12/05 04:51 AM

In reply to:

Gibbs505, the .585 Nyati was developed my Mr. Ross Seyfried. The 577 Tyrannosaur was developed by Mr. Art Alphin of A-Square. They are indeed different cartridges which start from different cases entirely. But they use the same bullet. Kind of like 30-06 versus 300 win mag.

Great!!

--------------------
So I can't spell, so what?

Those who beat their swords into ploughshares, will plough for those who don't!

Those who fail to learn from history will be doomed to repeat it

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vikram
.300 member

Reged: 29/07/04
Posts: 105
Loc: Warwickshire,England

Re: .577 T-Rex- , genesis,makers, Ballistics etc [Re: KennethI]
#43022 - 05/12/05 12:15 AM

Hi Kenneth,

I didn't read 500Grains' article.Where can I read it?Would appreciate.TIA.

Best-

Vikram

--------------------
"Routine is death to Heroism."- P.G.Wodehouse

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Charles_Helm
.333 member

Reged: 09/11/05
Posts: 337
Loc: Dallas, Texas

Re: .577 T-Rex- , genesis,makers, Ballistics etc [Re: vikram]
#43030 - 05/12/05 01:19 AM

In reply to:

Hi Kenneth,

I didn't read 500Grains' article.Where can I read it?Would appreciate.TIA.

Best-

Vikram

Try this thread.

--------------------
Some pictures from Namibia

Some pictures from Zimbabwe

An Elephant Story

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