Good place/brand of 69-75g .223 to buy?

[RAINS]

I've got a 10.5 sig sbr coming soon. Need some carry ammo for it. Want to use 75ish grain ammo. But dam the stuff is spendy. This rifle has a lifetime warranty on it that I don't want to void by shooting crap ammo. So just where can I find 75g .223 that is brass/boxer factory new us made and affordable?

I found this stuff but I'm not sure of quality as they do no list the mfg.

http://www.tacticalammunition.com/223-75GR-HPBT-NB-50-TA88-051-TA88-051.htm

 

[303tom]

Hows 8 bucks a box ?

http://www.midwayusa.com/find?&sortby=1&itemsperpage=20&newcategorydimensionid=9785

http://www.midwayusa.com/product/30...ollow-point-bi-metal-steel-case-berdan-primed

Give em a call..........