Maximum energy subsonic


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ctdonath
December 3, 2006, 08:10 PM
Considering that subsonic ammo maxes out around 1000fps, any thoughts on how to efficiently maximize energy with that limit? .50BMG bullets are somewhere around 650 grains, and I don't know of anything practically heavier (larger caliber has legal issues). Thing is, the .50BMG case is way too big. Is there a combination of heavy bullet and small case that optimizes for about 1000fps?

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Novus Collectus
December 3, 2006, 08:13 PM
.510 Whisper I think.
http://en.wikipedia.org/wiki/.510_Whisper

rangerruck
December 3, 2006, 09:35 PM
maybe a 45 bushmaster.

atblis
December 3, 2006, 10:36 PM
How about a 45-70 with some really heavy bullets? It's straight walled, so I think you can have the bullet take up as much of the case as you want. 550gr is the heaviest I can think of at the moment.
http://www.beartoothbullets.com/open_sight/archive_open_sight.htm/21

Car Knocker
December 4, 2006, 12:00 AM
Sharps .50-70 or .50-90.

atblis
December 4, 2006, 01:21 AM
That would work as well.

I suppose you could use 50BMG bullets in the Sharps?

.38 Special
December 4, 2006, 01:30 AM
.700 Nitro fires a 1000 grain bullet. Big case and goes more than 2000 FPS, though.

Cut the case in half, I sez.

That would be the easy part, anyway. The tough part would be figuring out why you'd want such a thing.

Mark Whiteman
December 4, 2006, 03:11 AM
There are some wildcats loading a 200gr+ bullet into the 7.62x39 case, for example. Speed is limited by the small case capacity. There is a book out of cartridge conversions and several on wildcats you should peruse.

Colt46
December 4, 2006, 06:23 AM
I can only add that it is a whole family of cartridges that are based on small bore centerfire cases that work in short actions. .221 Fireball seems to be a favorite with many conversions. I love the concept of a Whisper cartridge just to fool around with. One day I'll probably get around to it.
My two favorites would be the .338 and the 6.5 mm flavors.

Tony Williams
December 4, 2006, 10:53 AM
Take your pick from HERE: (http://www.quarry.nildram.co.uk/silcart.html)

Two pics from the article:

http://www.quarry.nildram.co.uk/silcarts.jpg

http://www.quarry.nildram.co.uk/silcarts2.jpg

Tony Williams: Military gun and ammunition website (http://www.quarry.nildram.co.uk) and discussion forum (http://forums.delphiforums.com/autogun/messages/)

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