The idea that a rifle chambered for 308/7.62 Nato can fire a 7.62 x 39 probably originated in Vietnam with all the stories about "They could fire ours but we couldn't fire theirs", and too many forget that while a longer straight walled case can fire shorter case rounds-.357 and 38 Special/Long Colt, 44 Magnum and 44 Special/Russian, the same is not true of rifle cases with shoulders, even if the case in question is shorter and the bullet diameter is the same.
|