Oh dear I had to laugh at the case life comment
Now i don't know how many handloads I have got from cases, never counted but I have yet to have a case failure on re-loaded cases. My dies are RCBS reloader specials and the cases are HXP-69. The rifles I ahve loaded for are:-
P-H Supreme sporterised BSA 1916 No1 Mk111
P-H De Luxe sporterised BSA 1916 No1 Mk111
P-H targetised ERA P-14
SSA No1 Mk111
Century arms P-14 Sporter
Martini Enfield AC11
No4T
P-H sporterised No4 1/2
BSA sporting rifle on Metford carbine action
BSA Model E
BSA Model C
Martin Muscat 303 bore
And no I do not usually keep cases segregated, the exception is the the Mucat martini that is of Belgian maufacture and the shoulder is different to British military and sporting chambers.
Modern American made brass is more often that not undersized which causes the brass to stretch more. I use this to my advantage with R.P brass as I use it to shorten and form into 6.5x53R as even the web area is undersized but corect for the 6.5x53R case.