I get that, from the brass vigorously hitting the receiver on the way out, and then hitting, well, whatever gets its way as it is hurled at 750mph on its way to the next county...
...this type of deformation is common with most assualt rifles...the degree of the deformation varries with the brass used...that is...it's composition...which will affect it's physical and chemical properities...such as it's indentation hardness...elasticity...bounce characteristics and so on...Tom Morris said:Just came back from firing my new SIG 556 classic for the first time. I noticed what I thought was peculiar damage to the shells after extraction.
Is this damage common for this rifle
What causes this type of damage? what part of the rifle is the shell contacting?