This is NOT steel core. This is a copper plated steel jacket. Wolf makes NO steel core ammo, especially not hollow points. Their bullets are a bi-metal. The copper exterior is .005" thick while the steel is 1/32" thick. So it will attract a magnet and give the appearance of having a steel core.
These sell for $5.29 at the Lebanon Walmart or $4.97 for FMJ. So for 600 you'd only have to pay $150ish. Your price is high and your description is misleading.