There's a back story with that...
I bought some 240g "keith" Hi-Tek projectiles from Missouri (18 hardness). Their softer #3 Cowboy Hi-Tek (12 harness) shoot perfectly up to 900 fps with no leading, so I figured the harder Keith offerings would be fine as well.
Wrong-o I was. I worked with all kinds of powders to get these to stop leading. Some were causing leading closer to the forcing cone, some at the end of the barrel, some slightly along the rifling (es, I know what these mean, so I was adjusting accordingly)...I couldn't get anything to work (I used Unique, H110, 2400). No matter what, all were leading at some point or another, and I tried all kinds of charges.
Finally, I decided on a load with a faster burning powder and went over to Hodgdon to see what they said. With the 10g they listed at max, I figured their load data, even "max" all runs very well, so I started with that, and I didn't want to run that 18 hardness projectile in sube 1K fps figuring it would lead even worse. Surprisingly, over 10g of Tight Group, they didn't lead, I was quite surprised. They shot very well, not a ton of recoil. Once the weather isn't 12F outside, I'm going to mess with lighter loads of the powder to see what they do.
With all of that said, Unique, 2400, and H110 are currently my go-to for 44 mag, not Tight Group. Once I burn through those Missouri projectiles, I'm not going to move forward with that powder for that round.