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Different 6mm Wildcats

 
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  #1  
Old 06-08-2012, 10:59 PM
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Different 6mm Wildcats

Can someone point me at any differences between a 6-06 AI and a .243 Catbird.

With some basic "Gugle Fu", it would seem the 6-06AI has a 40 degree shoulder and the Catbird is designed with a 35 degree shoulder. Both improved, just with a different shoulder angle?

Both made with either 30-06 brass but easier to do with .270 brass...which I have lots of.

The reason for this project is that I've already bought a SS Shilen Select Match 1:8 ratchet barrel but I didn't realize until I started pulling my M70 apart...that I actually have a .243 Win, built on a Long Action.
Since it's just going to be a light use, strictly hunting rifle...I figured...why not utilize the long action and roast that pipe.

Would anyone have a line on a DBM for the long action M70, and to go with it...a Double Stack, Single Feed mag that would handle 30-06 style rounds.
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  #2  
Old 06-09-2012, 12:59 AM
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Re: Different 6mm Wildcats

I also believe going off memory that the jarret is actually based off the 270 and there fore has a longer neck while the 6-06 has a shorter neck. Personally id do the jarret
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  #3  
Old 06-09-2012, 09:56 AM
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Re: Different 6mm Wildcats

They are both so close in performance they can be said to be ballistic twins. The 6-06 AI is easier to form as you can use 25-06 brass which is easier to neck down then even 270 brass.

Both of them are boarderline on having more powder capacity then can be used in the 6mm bore. Often times with the slow burning stick powders you can see the occasional powder bridging issue that causes extreme pressure spikes. For this reason, their best performance is left to the ultra slow burning ball powders.

They are also best served with bullets heavier then 100 grains. Lighter bullets can be driven very fast but on average velocity spreads are very wide with lighter bullets.

Personally, I prefer the standard 6-06 over the AI or the catbird, no fireforming needed and it feeds better and also about as much performance as you want in a 6mm. Just a better design all around for this bore size. Coming from me this may be a strange comment but in the case of the 6mm and the bullets we have available, the 6-06 is my recommended top end.

Fireforming a round with such a limited barrel life is hard to swallow at times, this is why the 6-06 is a much better choice. Maybe not as SEXY but a great choice, plus all you need to load ammo is a 25-06 FL die to size the body, a 243 win neck die to size the neck and a 243 Win seater die to seat the bullets, just need to adjust the height position of the 243 dies and they work great.

Catbird dies will be pretty spendy, 6-06 AI dies are not all that bad but can be hard to find in stock from time to time.
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  #4  
Old 06-09-2012, 12:45 PM
B23 B23 is offline
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Re: Different 6mm Wildcats

Kirby

What are your thoughts with regard to the 6-284 vs 6-06??? They seem to be nearly identical but I think the 6-284 is about the easiest wildcat out there and that's using the best brass money can buy. My dad recently had a 6-06ai built and it is a beautiful rifle but I always debate the issue with him that it's far to much work for what little he gained over a straight 6-06 or even 6-284.

It seems by the time everyone settles in with their accuracy loads all three are shooting about the same fps.
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Old 06-09-2012, 01:56 PM
Edd Edd is offline
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Re: Different 6mm Wildcats

I have a 6mm-280 that doesn't require fire forming.
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  #6  
Old 06-09-2012, 07:03 PM
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Re: Different 6mm Wildcats

B23,

Your correct, now that we have very good quality 6.5-284 brass to play with the 6-284 is a very good option, OP just did not include the short action wildcats in his post. The 6-284 and 6-06 are very similiar in performance, the 6-06 will out perform the 6-284 is the 284 is built into a repeating short action rifle and needs the bullets seated deeper but other then that they are very similiar in performance.

The Between the 6-284 and 6-06 in a repeating rifle however, there is no comparision, the 6-06 feeds like its not even there, the 6-284 can be abit choppy to feed, espeically out of a short action, double stack mag box. I generally recommend something like the HS Precision DM system which is a center feed design and then there are no feeding issues at all with the shorter, fatter, rebated rimmed 6-284.

Generally speaking, I recommend the 6-284 for varmint rifles or single shot rifles where feeding and OAL is of no concern. For a light to medium big game rifle, I generally recommend the 6-06 for its better feeding characteristics.

As far as forming brass for either, they are vastly superior to any AI or any other round in this class that needs fireforming as they can be cold formed and loaded for the first time with top pressure accuracy loads.
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  #7  
Old 06-09-2012, 07:04 PM
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Re: Different 6mm Wildcats

Quote:
Originally Posted by Edd View Post
I have a 6mm-280 that doesn't require fire forming.
Really just another version of the same thing, 6-06, 6-270, 6-280, all are within 50 fps of each other, none require fireforming. Good choices all around for a hyper performance 6mm.

As with all extreme chamberings, no matter what the caliber, they tend to offer the best consistancy when used with heavy for caliber bullets.
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Kirby Allen(50)

Allen Precision Shooting
Home of the Allen Magnum, Allen Xpress and Allen Tactical Wildcats and the Painkiller Muzzle brakes.

Farther, Faster and Flatter then ever before.

Web Page: www.apsrifles.com

allenmagnum@gmail.com
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