Do you have the source on this info? Also what do you mean with shell here, can you be more specific since the projectile inside the shell is what matter anyway. You mean 30% decrease of penetration from APFSDS or maybe from HEAT or both? 30% is believable though since it's in the same ballpark with the russian relikt ERA.The specs for the FY4 was to eliminate 30% of the shell's penetration.