500 Auto Max integral

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McLarenross
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500 Auto Max integral

Post by McLarenross »

So my father is building an AR10 in 500 Auto Max and it's got me thinking, why not build it in a Remington 700 action and do it as an integral suppressor? It's 0.473 case head so a standard bolt face, it headspaces on the case mouth is isn't ideal but that's the nature of the beast for these types of rounds, it will feed from AICS mags with a little tweaking I think, and I can get 700gr bullets for it! I'm thinking a ~10 barrel with a 6" long permanently welded "muzzle brake" that's essentially a mono-core then 5 or 6 60° cones in front of that. Total OAL about 20" and not too heavy. Throw a 2.5-10x Viper PST on it and have an awesome subsonic heavy hitter. Thoughts?
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fishman
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Re: 500 Auto Max integral

Post by fishman »

You could do the same thing on an AR10. Either would be awesome in different ways.

I always recommend against welding silencer parts to barrels. Would the brake be considered a silencer part in your design? If so, id just SBR your 700 and do a more traditional integral.
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Re: 500 Auto Max integral

Post by Capt. Link. »

I would consider using a controlled round feed like the Mauser.Case mouth head-spacing as you know is not ideal and the rim support of the Mauser will aid ignition.
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Re: 500 Auto Max integral

Post by T-Rex »

Have you looked at the 45 Raptor?
It was made for the AR10 platform and is a pretty easy swap.
Energy and velocity are damn close, if this is a requirement.

What was your thinking for a monocore and cones?
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Re: 500 Auto Max integral

Post by McLarenross »

I/we looked at the 45 Raptor as well but I want this for subs really and i couldn't find bullets over 350gr for 0.452" bullets. If 45 Raptor was 0.458 I'd be sold for sure.

Here is what I'm thinking for can design. The "brake" is 6in long and threads onto the 10" barrel and I will permanently attach it either with a small TIG well or blind pin and weld to meet 16". I don't really think I need the brake and the cones but that setup still is right at 20" and shouldn't be too heavy so they can't hurt. I just can't rationalize SBRing a bolt action or else I would. My main reason for a Remington action is availability of stocks, bottom metals etc. I would also consider a Savage if I find a good deal on one. A CRF action would be nice but it's getting harder to find Mausers that are in good shape around here that I trust for higher pressure Ioads.
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Re: 500 Auto Max integral

Post by McLarenross »

OK so working with it some more and upon advise I am dumping the "brake" idea. too much machine time, not really adding much suppression, and heavy.

Now with fifteen 60 cone baffles, ported barrel, and external muzzle brake cap to hold it all together. Ill still thread the tube to the barrel at the breach but then blind pin/weld it from the bottom back there to make the sleeve permanent and over 16". This will all be stainless on a centerfire so disassembly for cleaning isnt really needed.

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Re: 500 Auto Max integral

Post by garredondojr »

I too have plans to do the same thing one day finances permitting but in a true "50 cal" ie. .510 bullet.

There are cast bullet molds in excess of 1000gr's and I would shoot cast pc'd bullets to add to the fun. The 50 razorback uses RUM cases and you could also shoot surplus 50 cal bullets but i'd want to shorten it some (to about a 500 s&w case length like you mention) as I have no plans for supers.

I was going to go the other route and just SBR the host weapon and make the suppressor removeable for other potential hosts :mrgreen:

Being that your going to run subs also i'd look into doing K's as there supposed to work better for slower moving gasses.
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