EXCUSE ME Dave.
Yes your quite right Andrew, for your information ..
Whilst not designed for this role, it inherited the name “Zveroboy” (Beast killer) from the SU-152, because it could knock out the Panther, Tiger, and King Tiger tanks, as well as the Jagdtiger, and Ferdinand/Elefant. It is actually well known for this role because the Soviets were able to make this into a very effective propaganda tool in the late war. Whilst the weight of the shells (and therefore slow loading) resulted in 1-3 rounds per minute, the sheer mechanical shock was enough to kill the crew of an enemy tank, or disable an enemy tank even without an armor penetration, which is useful because generally, these shells did not penetrate. It has even been reported that the shell could totally blow the turret off of a Tiger tank!
At Kursk, AP shells were given to the ISU-152, but these rounds were expensive, hard to make, and were in very short supply, as well as only being a little more effective than the HE round. Finally, when fired upon, the ISU-152’s 90mm, 90 degree sloped armor fared well against 75 mm German guns at long ranges, but the Tiger’s 88mm gun was always a killer. However, despite stories and amazing photos of the ISU-152’s exploits as a tank destroyer, at close ranges, it was vulnerable to German high caliber guns, and it had a low rate of fire. Not only this, but it was inaccurate, and not intended for the role. ISU-152s tended to be used for direct fire as an assault gun, which saw it fighting against enemy positions, not necessarily enemy tanks.
Thanks Dave.