The 10.2 Jaguar was made by Jaguar in all probability prior to 2009 for a GPR prototype rifle with interchangeable barrels in .50 Cal. (12.7×99), 10.2×94 Jaguar, and .700 Jaguar Subsonic. The case of the 10.2×94 is based on the .50 Cal. and there are examples made of stainless steel (with steel base) or brass. Bullet is a Jaguar Sport copper solid that weighs 30.4 g (469 gr).