This is unrelated, but here goes. Can I use a good k4 Weaver on a air rifle,I have been told no...it must a air gun scope. The one that came on this gamo is 3/9 the best it can do is 3 to 4 inch at 25 yards. With very good pellets. Thanks guys.I have a case of Federal Small Rifle Magnum primers that that a friend who passed away had stored in his basement for many years. Do you recall what years Federal packaged primers in red & white cartons?