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What ammo should I use for the Bushmaster XM15-E2S?

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I purchased a Bushmaster XM15-E2S. It says, 223-5.56 caliber. Is it okay to shoot 5.56 ammo? One FAQ said not to shoot 5.56 in a 223 because of excessive pressure. I can not find XM15-E2S on your web site. Also I was told to shoot only brass cased ammo. Wolf ammo is steel cased. A notice that came with the rife said Wolf ammo cycled good at the factory from your rifles. Can I shoot Wolf ammo safely or should I stay away from Wolf steel cased ammo for this XM15-E2S?


The Bushmaster rifles are chambered in 5.56 NATO so it is safe to fire 5.56 and .223 ammunition. All the aluminum receiver Bushmaster rifles are XM15-E2S models. You can try the Wolf ammunition if you want. I would recommend trying a sample before buying in bulk to see if it cycles alright. You will get better performance from American factory brass ammunition.

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