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Promised pics of the 510 Allen Magnum...

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Unread 02-28-2008, 01:32 PM
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Join Date: Dec 2007
Posts: 130
That action looks huge! One of the 50's I shoot is a McBro's, it has a 30 inch lilja. I get 2820 with the 750amax. Im dying to see what u kick the velocity up too!
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Unread 02-28-2008, 04:03 PM
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Join Date: Jun 2004
Location: Fort Shaw, Montana
Posts: 6,841
What load are you using to get 2820 fps with the 750 gr A-Max. I have shot alot of 50 BMG rifles with this bullet and in a 32-36" barrel length, all have limited out at around 2700 to 2750 fps with proper pressures for the 50 BMG, that being, being able to rechamber a fired round with no real resistance on the bolt when you close it on the fired case in the chamber.

I have run them over 2900 fps so far with decent results but thats starting to move the brass quite a bit and resizing takes some effort.

Kirby Allen(50)
Kirby Allen(50)

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

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Unread 02-28-2008, 04:19 PM
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Join Date: Dec 2002
Location: mathias wv
Posts: 987

I am pondering building a 20 tactical, thought I'd check kirby's post out......boy do I feel inadequate!
Born to Hunt, Forced to Work!
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