Originally Posted by Poink88
Planning on buying an AR in the future and starting my research on what ammo to use now.
What is your preferred (or recommended) ammo and for what application (target, SD/HD, hunting, etc.)?
The answer varies from gun to gun but it depends on which AR you buy and what you will be using it for. If you buy a gun with a twist rates of 1:7 you should have no problems runing anything in the 55 gr. and above class. I use 55 gr FMJ Federal standard military grade ammo for practice and Gold Dot 64gr for SD but they are only available to LE at this time so they can be tough to come by. A great alternative for SD is athe TAP ammo. Both the Gold Dot and Tap will work well on coyote and deer if you are so inclined and Fedaral, Hornady and others have heavy for caliber hunting type bullets that will work very well too.
If you will be using your AR for varmint hunting then the above twist is too fast and bullets in the 45gr. HP class bullets CAN come apart in flight and if they don't they will probably shoot poorly but a twist that slow will not shoot the heavier bullets well. My favorite AR has a twist rate of 1:9 and works with both types of bullets well but because it's a short barrel it slows down the 45's to the point that they will not self destruct. I would not do a 1:9 in a 24" tube and expect the same results.
If the gun will be used strictly for target work the 1:7 twist will stabilize heavier HPBT (64gr and above) Match type ammo. Black Hills and Federal Gold are very good with their Match ammo with outfits like Privi following closely in their heels.