Earlier this year I purchased two boxes of .223 Coyote brand Ammunition for use in my Ruger Mini-14 Ranch rifle. The first three rounds were surprisingly hot, but not so much as to cause concern. The fourth shot resulted in a catastrophic case falure. The explosion blew the five round mag completely out of the rifle, and froze the bolt in place. The blown mag was in three pieces. The bolt required a mallet to knock it loose. The failed case had a case separation around half the diameter, and another crack running from the base to the case neck. There was no damage to the rifle (thanks Ruger). I changed over to some Winchester ammo to verify that everything was still OK, and it functioned perfectly, as usual. I disposed of the remainder of the ammo, under the belief that I had a bad lot. This weekend I had another failure - not as bad, but it still locked up the bolt and had case base separation. This failure was from a separate lot from the first failure. I did some checking on Coyote brand ammunition and discovered that they are reloads, but are supposed to be loaded to SAMMI (?) specs. I consider them too hot, and unsafe to use - ever. Please consider, and beware !! Oh, the Ruger is not at fault.