This is currently manufactured obsolete caliber SMOKELESS ammunition for reproduction firearms chambered in 50-110 Winchester caliber. This ammunition uses properly headstamped cases (item #STR50110) and a .510" 350 grain flat nose bullet (item #512350). This is not for original firearms but only for current reproduction rifles that the manufacturer says are rated to use smokeless ammunition.
NOTE: All ammunition is shipped via FedEx or UPS Ground "Adult Signature Required" ONLY. So be sure you have a physical shipping address on your order as they will not deliver to a P.O. Box.