My question becomes is this what the customer wanted? Would assume so. Only to find that rifles with tired springs experienced no joy perhaps, and hence the reputation?
We will see if they go bang as-is first before swapping primers. Looking for rounds that can shoot well in a wartime expedient '42 Maltby with a short throat but that awful 2-groove barrel.
Maaaaybe let some fly in my all-original (T) but inclined to approach that one carefully as it is worth a real penny. Hand loads into Prvi brass.