5.45 in an AR is still cheap. Aim has the milsurp stuff for $120 per 1080 round can, if you buy two http://www.aimsurplus.com/product.aspx?item=A54539R&groupid=33
The S&W M&P 15R carbine is a hoot to shoot. It's not big a deal to clean for corrosive ammo. C Products makes a quality, cartridge-specific 30 rd mag for this AR. I've shot over 2,000 rounds of the stuff though mine with no problems.
Some Wolf 70 gr non-corrosive has a bullet nose shape not conducive to the M&P chamber. Other lots of the Wolf 70 gr run fine.
The S&W M&P 15R carbine is a hoot to shoot. It's not big a deal to clean for corrosive ammo. C Products makes a quality, cartridge-specific 30 rd mag for this AR. I've shot over 2,000 rounds of the stuff though mine with no problems.
Some Wolf 70 gr non-corrosive has a bullet nose shape not conducive to the M&P chamber. Other lots of the Wolf 70 gr run fine.