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Need help picking bulk ammo


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I have an armalite ar10 tactical with a 16” barrel, a 1:11.25 twist, mid length gas system and an adjustable gas block. I believe armalite recommends 150-175 grain ammo. To keep the cost down would 149 grain ammo be perfectly fine or does 1 grain make that big of a difference? Can I run into any issues using a not ideal grain?

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What are you wanting to do with the ammo?  Target?  Hunting? 

What distance are you planning to shoot?

This will determine what ammo may be more suitable for you and your need.  The short answer is that 149g ammo should function just fine in your rifle.  How accurate it may be can be different with any barrel, even in a similar rifle.

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