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Would it be reasonable to assume case head separations on RIMMED cases would be much more unlikely than rimless cases?
A couple years ago Out shooting my Henry BB .357 and I fired, cycled it, and noticed only the head and about 1/4" of the case ejected. I had to reach in with a pick and pull the rest of the case out.
Long story short but several of the rounds did this. FWIW It was Sellier & Bellot brass.
I picked up the intact cases and slid a dental pick down them and discovered several of them had a cylindrical 'ring' indentation near the head of the case. The outside of the cases looked normal.
In my life of loading who knows how many 1000s of rounds of .357 I had never had this happen before (and never rimless) , and for the life of me cannot even guess as to what cased the 'ring' indentation on the inside of the cases.
My thought being because It head spaces on the rim, is in the chamber as far as it can go, and is held in place by the bolt face so it cannot move rearward upon firing which I always thought was the cause of case stretching and ultimately separation.
I was discussing this on another forum and one member was adamant it did not matter rimmed or rimless case stretching can occur.
Fire away!
A couple years ago Out shooting my Henry BB .357 and I fired, cycled it, and noticed only the head and about 1/4" of the case ejected. I had to reach in with a pick and pull the rest of the case out.
Long story short but several of the rounds did this. FWIW It was Sellier & Bellot brass.
I picked up the intact cases and slid a dental pick down them and discovered several of them had a cylindrical 'ring' indentation near the head of the case. The outside of the cases looked normal.
In my life of loading who knows how many 1000s of rounds of .357 I had never had this happen before (and never rimless) , and for the life of me cannot even guess as to what cased the 'ring' indentation on the inside of the cases.
My thought being because It head spaces on the rim, is in the chamber as far as it can go, and is held in place by the bolt face so it cannot move rearward upon firing which I always thought was the cause of case stretching and ultimately separation.
I was discussing this on another forum and one member was adamant it did not matter rimmed or rimless case stretching can occur.
Fire away!