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Anyone load the .450 Bushmaster for an AR platform?
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Looking for the lightest load possible that will cycle my AR pistol.


~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
J. Lane Easter, DVM

A born Texan has instilled in his system a mind-set of no retreat or no surrender. I wish everyone the world over had the dominating spirit that motivates Texans.– Billy Clayton, Speaker of the Texas House

No state commands such fierce pride and loyalty. Lesser mortals are pitied for their misfortune in not being born in Texas.— Queen Elizabeth II on her visit to Texas in May, 1991.
 
Posts: 37898 | Location: Gainesville, TX | Registered: 24 December 2006Reply With Quote
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Only you can learn that on your platform. Start with the fastest powder and work down from the starting loads. Why fast powder? It has the lowest port pressure, usually. Steep pressure curve you know.
OTOH, every loading manual will say not to go below the starting loads.
 
Posts: 17295 | Location: USA | Registered: 02 August 2009Reply With Quote
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OTOH, every loading manual will say not to go below the starting loads.


Why is that? The Lee Manual teaches that it is usually safe to down with the faster powders.


~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
J. Lane Easter, DVM

A born Texan has instilled in his system a mind-set of no retreat or no surrender. I wish everyone the world over had the dominating spirit that motivates Texans.– Billy Clayton, Speaker of the Texas House

No state commands such fierce pride and loyalty. Lesser mortals are pitied for their misfortune in not being born in Texas.— Queen Elizabeth II on her visit to Texas in May, 1991.
 
Posts: 37898 | Location: Gainesville, TX | Registered: 24 December 2006Reply With Quote
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Why is that? because if you get a half full case of certain burning rate powders and the moons are aligned properly it will cause SEE, and blow up your rifle. Or stick a bullet in the barrel, both of which is bad for business.
And they don't want to risk it, even though AFAIK no one can duplicate it. But it has happened with slower powders.
 
Posts: 17295 | Location: USA | Registered: 02 August 2009Reply With Quote
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