Anyone have target or game exp with this round? Thinking about getting an upper in this cartridge for my DPMS A-15.

For the power it delivers, there just aren't bullets available for .452" yet. Take a look at the .458 Socom if you're looking for a hard hitting big game cartridge in an AR.

Thanks for the skinny on that. Kinda liked the ballistics I saw for the 450 bushmaster,but not opposed to 458 Socom just not real familiar with it.

For white tail deer @ 125 yards and less is there a lot of difference in muzzle energy between the two rounds?

I have been shooting a 450 Bushmaster for 6 years and using Hornady 250gr factory ammo it is devastating on deer and hogs. This setup will shoot sub MOA at 200 plus yards. I was able to harvest 4 deer in under One minute during the 2009 hunting season. I was hunting a food plot and had doe tags to fill, a group of does came into the plot about an hour before dark, and it was "Bang Flop" with each pull of the trigger. Also, every hog has been a one shot harvest. I don't want to sound like a commercial for Bushmaster or Hornady, but this package works. You won't be disappointed in adding this to your AR collection

Thanks for the info guys looks like both rounds would work good for the hunting I want to do.