Author Topic: 550 magnum a new dangerous game cartridge. (Read 3105 times)

RNS · « **on:** November 13, 2003, 06:19:00 AM »

458 lott 500gr, 550 mag 700gr, 550 mag 800gr, 600 OK 900gr

Gentleman
I created the 550 magnum to fill in the gap between the .510" and the .585" bore cartridges. The 550 magnum also was designed to use the Cz 550 mag action in 416 Rigby which makes it a simple and cost effective conversion. The desired load will be a 700 gr @2300fps @ 8,222 ftlbs at the muzzle which equals 600 nitro express energy levels. The .550 bore diameter should allow greater peneteration than the 600 nitro and come close to the penetration common to the .510 bore cartridges. The brass is based on cylinderical 378-460 Weatherby so most of the problems common to big bore brass has been eliminated. Head stamped brass should be completed in December.

I will post more imformation later. Please let me know what you think RNS

BattleRifleG3 · « **Reply #1 on:** November 13, 2003, 09:26:30 PM »

What type of bullet is on the far right? Looks pretty cool!

RNS · « **Reply #2 on:** November 14, 2003, 08:20:35 AM »

.550" 700gr hawk, .550" 800gr hawk, .620" 900gr, .620" 900gr (Bridger solid)

Bridger Bullets @ bridgerbullets.com .550" 600gr and 700gr solid

BattlerifleG3 that bullet is a Bridger solid. RNS

BattleRifleG3 · « **Reply #3 on:** November 14, 2003, 10:09:22 AM »

Solid brass? I noticed the different color.

I was wondering if someone could explain how one develops a >50 caliber cartridge in compliance with the NFA, since it rules all bores over 1/2 inch except sporting shotguns are Destructive Devices.

RNS · « **Reply #4 on:** November 14, 2003, 10:28:52 AM »

Well first it must be classified a sporting cartridge. 600 nitro, 700 nitro, 577 t-rex. Most of them use bore diameters that have been around prior to the ban. I based my bore diameter on the 55-100 maynard. RNS

RNS · « **Reply #5 on:** November 14, 2003, 05:13:29 PM »

Gentleman
I recieved the head stamped brass today :-D and the main brass order should be 4-6 weeks out. The head stamp reads 550 magnum . RNS

RNS · « **Reply #6 on:** November 17, 2003, 12:29:49 PM »

Gentleman
Here is a pic of the head stamped brass

Barrels are being produced by WELLS SPORT store.
Bullets are being produced by HAWK and BRIDGER.
Reloading dies are being produced by C&H TOOL and DIE.

Anyone interested needs speek up for the first run on the barrels.
RNS

ingwenya · « **Reply #7 on:** November 24, 2003, 01:32:15 AM »

That thing looks like a beast. I love it. Living out in West Texas I really couldnt use it, but I'd love to. I was thinkin about gettin a CZ .416 Rigby. Thats one helluva conversion, what does a conversion like that cost?

RNS · « **Reply #8 on:** November 24, 2003, 05:00:48 AM »

Ingwenya

First let me say that this cartridge was designed in april of this year and as of November (8 months) we have 8 barrels on order correctly head stamped brass and a growing list of companies supporting this cartridge.

Companies supporting this cartridge so far are

Barrels @ Cut Rifle/Wells Sport http://www.cutrifle.com/barrels.html

Bullets @ Hawk http://www.hawkbullets.com/
Bridger http://www.bridgerbullets.com/
GS Custom ( Said they would )

Head Stamped Brass @ Quality Cartridge http://www.owlnet.com/quality/

Loaded Ammo @ Quality Cartridge

Realoding Dies @ C&H Tool and Die http://www.ch4d.com/

Gunsmiths @ MICHAEL SCHEAR email @ gilagunwks@aol.com

Reamers @ Manson Reamers

This cartridge would cost the same as any big bore conversion 500 a2 and others like it.

The barrels are by Wells Sport store who are very well known for top Quality big bore rifles and the barrels are $380.00 with an intergral recoil lug

Brass is the same cost as 500 A2 since it is made from the same thing. That will vary depending on the manufacture. Bell brass is $2.00 a piece with out head stamp. Dieter Horneber is producing a run that I am waiting on and I am sure the shipping will raise the cost a little. Bruce Bertram also has brass and we have exchanged email on his brass. Quality Cartridge will charge a small fee to head stamp, clean, trim, polish the case.

Stock is kind of up to you but any big bore stock is probably $250.00 and up

Hawk bullets are with in a few cents of Andy's .510" and .585" bullets they are about $1.00 apiece

Dies are $160.00 for a 1" die body

We are working on a cast bullet from a well known maker who has a well known reputation of being able to shoot his bullets at 2,000 fps and a guess on the cost will be .30-.35 cents apiece.

Cleaning equipment is 28 ga both have a .550 bore.

Hope this helps RNS

KING · « **Reply #9 on:** November 27, 2003, 03:40:28 PM »

I wish you guys would just plain stop doing this,putting new toys onna forum. Its gunna be CHRISTmas kinda soon and seeing I dont have anyone (except the dogs) to get something for,I just might have to get myself a surprise new toy.........stay safe......King

RNS · « **Reply #10 on:** December 05, 2003, 03:40:04 PM »

I recieved my Cz 550 mag action and I included a dummie round and 28ga cleaning gear

RNS

RNS · « **Reply #11 on:** December 16, 2003, 07:57:49 AM »

I went to Prescott Az to see the barrel make and here is what we have so far 26" long .850" at the muzzle and the washer is for the recoil lug.

RNS

RNS · « **Reply #12 on:** December 24, 2003, 07:21:02 AM »

Here are the front sights rear sight and barrel band

with sight and hood

1 2 or 3 leaf sights

We are working on a quarter rib for this barrel contour

RNS

hubel458 · « **Reply #13 on:** December 25, 2003, 09:11:02 AM »

I am one of the nutz building a 550.Mine is a longer version than
what the others are building using Weatherby brass.RNS developed
a 2.9- 3 inch case. and my 550 HE(Hubel Express) is 3.7 in long.I have
a 50 cal barrel that CutRifle is reboring to .550 when he gets first batch of
barrels done for others that are buying first run.Ed.

RNS · « **Reply #14 on:** January 02, 2004, 07:06:52 AM »

I recieved the reamer last week and the letter from the ATF.

Wayne cast the first of the cast bullets for this monster and they weigh 705gr without sizing or lubed yet.

RNS

RNS · « **Reply #15 on:** February 06, 2004, 06:46:53 AM »

Here is a pic of our cast bullets that wayne did the should be perfect.

715gr 550 Mag, 405gr 458

RNS

RNS · « **Reply #16 on:** February 24, 2004, 10:11:26 AM »

550 MAGNUM HOME PAGE

http://hometown.aol.com/goldcoins1/myhomepage/index.html

RNS · « **Reply #17 on:** March 03, 2004, 09:24:07 AM »

some updates

RNS

RNS · « **Reply #18 on:** March 29, 2004, 11:44:30 AM »

Compairing the 500 A-square and the 550 Magnum

RNS

RNS · « **Reply #19 on:** May 05, 2004, 08:41:45 PM »

:-D Midway is now carring 550 Magnum brass

msorenso · « **Reply #20 on:** March 01, 2005, 11:40:29 AM »

Can you put this in an a rugar#1?