7.62×54mmR
The name is sometimes confused with the "7 . 62 Soviet" round , which refers to the rimless 7 . 62×39mm cartridge used in the SKS and AK-based ( AK-47 , AK-15 , AEK-973 ) rifles . 
<triplet> SKS <subj> 7.62×39mm <obj> ammunition <triplet> AK-47 <subj> 7.62 <obj> bore <subj> 7.62×39mm <obj> ammunition <subj> 7.62 <obj> bore