Originally Posted by
James NM
The ammo is definitely cheaper. But the reasons it's cheaper is because:
1) It is less popular and therefore less demand (at least currently - but subject to change)
2) It is steel cased, which I personally don't like to shoot in my AR's
3) It is corrosive
Don't compare the price of steel case 545 to brass 556. If you want to shoot steel case ammo in your AR, steel 556 is way cheaper than brass 556.
Another downside to AR's in 545 is I believe resale value to be less than 556.