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  #1  
Old 03-22-2011, 08:15 AM
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perazzimx2000


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hello everone. brand new to site. have a ? for you rifle guys. i am interested i think in a 243 catbird. like the idea of a 75gr. @ + 4000fps. would have to be pure evil on cyotes and such. any insight would be helpful. thanks...
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  #2  
Old 03-22-2011, 09:57 AM
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Location: Mooresville, IN
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Welcome to ShootersForum, PerazziMX2000. I think you'll find this is just about the friendliest and most knowledgeable gun site on the web.

Rather than reinvent the wheel, check out this thread from a few years back.

http://shootersforum.com/showthread.htm?p=440909

Looks to me like Mr. Jarrett's take on the 6mm/06 and awful close to the old 240 Hawk. I think if I just had to have more zoom than the 243 Winchester, I'd build a 6mm/284 or 243WSSM, instead. Same velocity and short barrel life, but a shorter, wider powder column for easier accuracy.

Last edited by broom_jm; 03-22-2011 at 10:00 AM.
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  #3  
Old 03-22-2011, 10:19 AM
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catbird

thank you sir. i will check the link. from what i have read the catbird is a necked version of the 270, which comes from the 06 case. just thought it an interesing round. something different. it will not be used as a high volume rifle. just a few yotes and the like few times a year. kinda wanting something different, and dont mind the extra effort in case prep. really like the idea of a heavier bullet at + 4k. i am a 22cal. shooter for the most part. dont really care for lots of recoil. again thank you for the info.knowledge is a wonderful thing!!
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  #4  
Old 03-22-2011, 05:18 PM
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I like the Catbird as well, don't have one but would like one. Definitely not a long barrel life but if it's not on the bench every time you turn around i say go for it. I think it would be a blast. Having said that though broom_jm has a good idea in the 6mm/284 as this would be a very accurate round. Either way best of luck to you and welcome to the forum.
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  #5  
Old 03-23-2011, 04:35 AM
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catbird

thanks for the welcome fred. the 243 cb just sounds cool. but the 284 round is probably a better choice. i will have to decide, need to save my $$ anyway.
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  #6  
Old 03-23-2011, 07:20 AM
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Join Date: Mar 2005
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Quote:
Originally Posted by perazzimx2000 View Post
thanks for the welcome fred. the 243 cb just sounds cool. but the 284 round is probably a better choice. i will have to decide, need to save my $$ anyway.

Welcome, As you will find out alot of opinions on 6mm wildcat calibers or standard ones.

Here what I've build in the past
6x284--1/14,1/8 twist barrel twist barrel 26"/28" long
6Rem 1/14,1/12,1/10 twist barrel 24"/26" long
6RemAI- 1/10 twist barrels 24"/26" long
243AI--1/10 twist barrel 28"
6x250-- 1/14 twist barrel 24" long
243--1/10 twist barrel 24,26,28" long
6br--1/8 ,1/14 twist barrel 24" long

One thing I've learned is finding a good gunsmith that likes to build wildcat calibers and he can give you some input from past builds.

If your planning on any type of volume shooting the calibers that give 4000fps in 6mm will give you the shortest barrel life and even working up a load will shorten it alot.

As you drop velocity of course barrel life will increase and you get around 3500fps be surprised on how much barrel life you get. I think I went thru about 8 barrels 1/14 twist with the 6x284 and about 4 with the 6Rem also 1/14 twist as my big plan was 3800/4000fs or better with 70gr bullets.

With some of the good barrel being made today like the 5c/5r the choices could be endless.

As to accuracy or which case may be better I think alot has to do with how good a shooter is on reloading and understanding on how to tune a load.

there an old story, guy walks into a famous BR gunsmith and ask him can he build a rifle to shoot in the .0's gunsmith ask him can you shoot in the .0's.

The days I'm shooting a 243AI,243,6BR and 6ppc.
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  #7  
Old 03-23-2011, 07:24 AM
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Location: perth-west australia
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catbird

why noy look at 257 weatherby-will easily surpass the cat bird and if not ,why not look at a 25/06. - just a thought.you must love the 6mm.--good luck with your endeavour
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  #8  
Old 03-23-2011, 07:39 AM
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Join Date: Apr 2009
Location: perth-west australia
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nail on the head

Quote:
Originally Posted by old roper View Post
Welcome, As you will find out alot of opinions on 6mm wildcat calibers or standard ones.

Here what I've build in the past
6x284--1/14,1/8 twist barrel twist barrel 26"/28" long
6Rem 1/14,1/12,1/10 twist barrel 24"/26" long
6RemAI- 1/10 twist barrels 24"/26" long
243AI--1/10 twist barrel 28"
6x250-- 1/14 twist barrel 24" long
243--1/10 twist barrel 24,26,28" long
6br--1/8 ,1/14 twist barrel 24" long

One thing I've learned is finding a good gunsmith that likes to build wildcat calibers and he can give you some input from past builds.

If your planning on any type of volume shooting the calibers that give 4000fps in 6mm will give you the shortest barrel life and even working up a load will shorten it alot.

As you drop velocity of course barrel life will increase and you get around 3500fps be surprised on how much barrel life you get. I think I went thru about 8 barrels 1/14 twist with the 6x284 and about 4 with the 6Rem also 1/14 twist as my big plan was 3800/4000fs or better with 70gr bullets.

With some of the good barrel being made today like the 5c/5r the choices could be endless.

As to accuracy or which case may be better I think alot has to do with how good a shooter is on reloading and understanding on how to tune a load.

there an old story, guy walks into a famous BR gunsmith and ask him can he build a rifle to shoot in the .0's gunsmith ask him can you shoot in the .0's.

The days I'm shooting a 243AI,243,6BR and 6ppc.
i think you hit the nail on the head-as we say in oz----its money for old rope.another aspect worth a look.
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  #9  
Old 03-24-2011, 09:27 AM
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catbird

Quote:
Originally Posted by gunho1954 View Post
why noy look at 257 weatherby-will easily surpass the cat bird and if not ,why not look at a 25/06. - just a thought.you must love the 6mm.--good luck with your endeavour
257 wthrby mag. starting to get to much recoil, very loud and lots of muzzle blast. i think.
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  #10  
Old 03-24-2011, 08:47 PM
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Join Date: Jan 2011
Posts: 19
How about a 6x47L it will move the 68gr bullets fast and will be plenty for 1000yds shots, long barrel, much longer than the CatBird or similar rounds. There are die available on the shelves and ready to ship. I can personally say the Dasher is just about all one person would need for those longer shots. 4000fps is nice but I beleive it should stick in the 22cal and below calibers. I have a 20PPC that will move the 40gr VMax's over 4000fps as well as many 17's that clock about 4700fps with the 17gr Vmax. JMO, Adam

http://bulletin.accurateshooter.com/...om-california/
Here is one my firends made for LR BR, the 243BRK. Adam

Last edited by ab_bentley; 03-24-2011 at 08:51 PM.
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  #11  
Old 03-25-2011, 03:24 AM
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Join Date: Sep 2009
Location: Mooresville, IN
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Nobody's mentioned the 6XC yet. It's a highly specialized competition cartridge that is not as fast as the Catbird, but probably much more accurate, with longer case and barrel life.
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  #12  
Old 03-25-2011, 10:30 PM
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Join Date: Feb 2011
Location: Port Lavaca, TX
Posts: 24
If a 6mm .243 bullet gets any better than the regular old 6mm Remington, I don't know how. The 6 mm is only about 150 FPS behind a .240 WBY and the barrel life is probably twice as long. The 6mm is a very efficient cartridge and it's a sweetie to shoot. Recoil is almost non existant, not much muzzle blast, and it is a killer with the right bullets and bullet placement. And with lighter bullets velocity can be fantastic. I'm just not in love with a bunch of coke bottle necked down to a phonograph needle cartridges.
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