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Rifle in the caliber?

This is a discussion on Rifle in the caliber? within the Projects forums, part of the Firearm Forum category; Fella's I been thinking about a big bore project and just can't seem to make up my mind as to what caliber I should settle ...


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Old July 28th, 2011, 06:51 PM   #1
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Rifle in the caliber?

Fella's I been thinking about a big bore project and just can't seem to make up my mind as to what caliber I should settle down on. I have given a lot of thought to some of those older British loadings but "good golly mis molly" the dies and brass could put me in a new Caddy in a couple years of shooting.



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Old July 29th, 2011, 04:01 PM   #2
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I built an AR with a .450 Bushmaster upper. Thing kicks like a 12 gauge and would a great hunting rifle. Just some food for though... don't know if you're an AR guy or not. Also a .50 Beowolf would be cool too....
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Old July 29th, 2011, 04:17 PM   #3
 
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Tracer, what calibers are you considering?
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Old July 29th, 2011, 04:22 PM   #4
 
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I went 50 BMG. Can't get much bigger than that.
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Old July 29th, 2011, 06:43 PM   #5
 
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^^^ How do you feed that thing .50 BMG? It can't be through the magazine well.
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Old July 29th, 2011, 08:16 PM   #6
 
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It's a single shot bolt gun upper. The lower is a Kalifornia type with a closed-off mag well housing a fixed lead filled mag.
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Old July 31st, 2011, 08:07 PM   #7
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Well gents I been looking real hard at the .505-Gibbs and the .500-Jeffery but those calibers are minted for those who have deep pockets and an oil rig or two pumping that black gold at a steady rate. The dies for those above are like $400 plus dollars and cases when you can find them are also sky high, to the tune of $150 bucks per a wallet of 10.....Cough Cough

So I decided that I will stay on this side of the pond with my rifle caliber and forget all about "nostalgia" during the days of the ivory hunters.

I have chosen the newer caliber called the .550-Magnum, with a .550 diameter bullet in weights of 600, 650 and 700 grain bullets. We have some mighty large chipmunks around the place and I don't want to have to shoot twice!

This rifle is going to be on a model 70 Winchester action, it will have the bells & whistles of a pre-64 model 70 Winchester rifle. It will just shoot a little bit bigger bullet is all. Recoil with a 700 grain bullet doing 2200fps is a mere 127-lbs in a 10.5 pound rifle. I plan on using a new stock with alumiinum bedding and mercury recoil tubes in the stock. The rifle will actually tip the scales at close to 11 pounds with just iron sights ..........NO scope!

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Old July 31st, 2011, 10:34 PM   #8
 
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Why not just build a 12 bore 3 1/2" lots of power and shells easy to make or buy.For a medium bore you could start with 45/70 up through 45/120
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Old August 1st, 2011, 03:33 AM   #9
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Amigo I got me one of those 45/70 Marlins down stairs, along with it's big brother a 45/120 Sharps replica. I wanted something with a lot more "smack down" power under 100 yards.

I and a friend of mine did a little research and it seems this newer caliber called a 550-Magnum and it's little brother, the 550-Express (which can be built on a model 70 or Mauser 98 action, which is smaller in length) was right up our alley.

Brass is easy to obtain (460-Wby) and dies are not sky high compared to those British Calibers. I suppose the Queen must take her cut too!
A .550 diameter bullet weighing 700 grains and going 1600 fps, is a force to reckon with for any 4 legged animal a hunter might seek out in the woods. Not to mention this caliber can Max out at 2200-fps. The Taylor K.O. factor for this caliber is 103 for a 600 grain bullet at 2400-fps and the 700 grain bullet at 2200-fps is a 121. The .458-LOTT with a 500 grain bullet is a 75 in comparison!

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Old August 1st, 2011, 04:20 AM   #10
 
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If you're not already set on that 550, you should check out the 500 CYRUS or the 50 TAC. A good friend of mine developed both of those. He offers dies and brass for sale and can either build you a rifle or set you up with a reamer.

They are both based on the 404 Jeffery case but shortened (think WSM length). The 500 CYRUS uses .500" bullets and the 50 TAC uses .510".

The ballistics are nothing short of phenomenal. Hodgdon has some load data on their website for the 500 CYRUS.

Customers of his have taken everything up to and including elephant with it and every PH that has seen the performance has been amazed.

One sent a 600 grain hard cast bullet north to south through a Cape buffalo and left a 2" hole all the way through.

Go to http://www.crossoutdoors.comfor more info under the Cartridges and Rifles Tabs. His contact info is on there as well.
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Old August 1st, 2011, 06:48 PM   #11
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Well I looked at that Link but those rifles are really not suited for what I wish to do and hunt with the rifle. I saw nothing reffering to hunting on the sight, mostly sniper rifles types and the big 50-BMG in a 26 pound rifle.

Last edited by Tracer; August 1st, 2011 at 06:50 PM.
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Old August 2nd, 2011, 04:49 AM   #12
 
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Quote:
Originally Posted by Tracer View Post
Well I looked at that Link but those rifles are really not suited for what I wish to do and hunt with the rifle. I saw nothing reffering to hunting on the sight, mostly sniper rifles types and the big 50-BMG in a 26 pound rifle.
Well the site is in a transition phase ( I should have said that before) because he is in the process of switching mainly to ammo production. But rest assured the 500 Cyrus was built as a hunting round (the 50 TAC not so much). There have been four or five articles on it in various magazines all reagarding hunting excursions. I have personally used it and have seen it used on several deer and hogs and it is devastating to say the least.

Look at the ones he has on this link (though some of those are sold) to see examples of hunting rifles. Cross Outdoors -New Products You should contact him even if you're not interested in his stuff. He knows more about bigbores than most and spent years working out all the bugs with his cartridges and knows what it takes to make rifles work with those big rounds.

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Old August 11th, 2011, 01:35 PM   #13
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Well fella's I have decided to go with a little bit larger bullet using a CZ-550 action. This rifle will shoot .550 Dia. 700 or 800 grain bullet out the barrel and will be a bonified "Stopper" rifle.

The Taylor K.O. at 2100 fps = 116 and the Thornily Stopper Index has it listed at 465! It can drive that 700 grn bullet up to 2400-fps....Ouch!
Recoil in an 11 pound rifle is close to 145-lbs.
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Old August 11th, 2011, 06:42 PM   #14
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Pics when done!
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Old August 14th, 2011, 04:50 PM   #15
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Yes gents, I will post some pictures when this rascal is finished. However, time wise it is going to take about 8 or 10 months to complete the entire project and that is if all goes well.

I plan on a 23 inch barrel, 3 position safety, action is a CZ-550 magnum, which does correspond to the caliber of .550! The main bullet weight will be a 700 grainer, with 72 Percent metplate. Now at 2200-fps, it should churn up a sizeable amount of kinetic energy as well as around 118 on Taylors KO scale. This is close to a 475 reading on Thornily's Stopping Scale.
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