Unverified load 3280 in caliber .375 Whelen Improved

LoadID 3280
Bullet .450 nitro express 3.25
Bullet Weight 480 grs
Powder cordite
Powder Weight 70 grs
Primer berdan
Brass Make eley
Barrel Length 24 (inches)
C.O.L 3.25 (inches)
Velocity 4930 fps
Group 100 yds (inches)
Submitted By keith
Gun Info
Comment can these cartridges still be purchased