450 LM "LeGendre Magnum"

Talk about the AR15 style rifles chambered in 450 Bushmaster.

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450 LM "LeGendre Magnum"

Postby gunnut » Fri Jan 27, 2012 11:48 pm

Drum Roll Please!!
I brought the idea up to Tim and he had been thinking about it for awhile. Just not enough time to do it. So, I provided the rifle, Tim provided the expertise to modify it and now I'm going to finish the development under Tims direct supervision. I've never done a WildCat before! But, I think I'm in good hands.Image
Rifle is Armalite AR-10
Barrel is a 20" .4515, 1 in 40T. Rifle "308" gas tube.
Case is a 284 opened up to 45 cal. trimed to 2.09
I'm going to start with 230gr. FMJs over 296. :D
Last edited by gunnut on Sat Jan 28, 2012 6:45 am, edited 3 times in total.
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Re: 450 LM "LeGendre Magnum"

Postby gunnut » Fri Jan 27, 2012 11:58 pm

Drum roll Please!Image
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Re: 450 LM "LeGendre Magnum"

Postby Hoot » Sat Jan 28, 2012 12:02 am

Schwing! Image

Now how about one necked down to .429? Ala .458 Socom? Imagine, a real shoulder to headspace upon! Or does that risk too much bolt thrust?

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Re: 450 LM "LeGendre Magnum"

Postby commander faschisto » Sat Jan 28, 2012 12:39 am

Cowabunga, man! A safari-grade AR...very cool.
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Re: 450 LM "LeGendre Magnum"

Postby gunnut » Sat Jan 28, 2012 12:43 am

I don't know. But, I will say the AR 10 bolt is pretty heavy duty! and the locking lugs are pretty beefie!
I have seen a 284 on the AR10 frame. or should I say the Big Block AR ;)
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Re: 450 LM "LeGendre Magnum"

Postby kottke_35 » Sat Jan 28, 2012 3:24 am

:mrgreen: I LIKEY!!!!!!! Sweet rig man!

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Re: 450 LM "LeGendre Magnum"

Postby Hoot » Sat Jan 28, 2012 6:55 am

Did you have to crimp with the resizing die to get the bulge down for it to thunk? Been there, done that. Not good. Swages the bullet way below caliber and accuracy suffers. :|

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Re: 450 LM "LeGendre Magnum"

Postby Al in Mi » Sat Jan 28, 2012 6:58 am

Did I read the twist right....1 - 40T??
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Re: 450 LM "LeGendre Magnum"

Postby gunnut » Sat Jan 28, 2012 7:04 am

Al, yes, 1 in 40" twist.
Hoot, the 284 case out at the mouth is pretty uniform down to where the shoulder Was and when you stretch it out to 45cal. it's about the same as the 450B brass.
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Re: 450 LM "LeGendre Magnum"

Postby etijsma » Sat Jan 28, 2012 7:24 am

Very nice, what all do you have left to do?
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