Some pistols do not offer as much case support as others. Certain Glocks are noted for creating the bulge and it was named the "Glock Bulge".
I don't shoot Glocks. All my 1911s are manufactured by Colt and I have never had bulges on the cases.
If by chance you are shooting your loads out of one of those mentioned Glocks, that is why you have the bulges.
The method I normally use to determine if I am out of bounds with my loads is the manner in which the case is ejected. Sometimes I had a load that would smack me right between the eyes (or in that territory) and I changed the load. Sometimes the ejected cases are thrown at maybe 8-10 feet from me. I back those down to get them 4-6 feet from me. And, the methodology goes on.
I am sure others have different methods to speak about when they think about them. This is just what I go by. It works for me, and that is what matters most.
I don't shoot Glocks. All my 1911s are manufactured by Colt and I have never had bulges on the cases.
If by chance you are shooting your loads out of one of those mentioned Glocks, that is why you have the bulges.
The method I normally use to determine if I am out of bounds with my loads is the manner in which the case is ejected. Sometimes I had a load that would smack me right between the eyes (or in that territory) and I changed the load. Sometimes the ejected cases are thrown at maybe 8-10 feet from me. I back those down to get them 4-6 feet from me. And, the methodology goes on.
I am sure others have different methods to speak about when they think about them. This is just what I go by. It works for me, and that is what matters most.