ARMOUR PLATE, 4 FT. " 4 R. >< 4i INS. 

 <4i IN.) ARMOUR-PIERCING SHELL OF 321 



• TEST OF PROJECTILE. 



2. Round 587. Hadfield's "HECLON" Cast Steel A.P. Shell. Capped. 



Striking Velocity 

 1920 



Enei'gy Foot-tons 

 840 



Factor of Penetration 

 218 



No. 872. 



