What cartridge are you planning to work on? I've used them for 44 magnum and for my particular bullet I liked them because I got really good accuracy for target shooting. However, I couldn't see any advantage to using them for hunting. I switched back to using non-gas checked bullets because they are fine. I think it's more important to work on bullet hardness, as with quenching. Some really good bullet designs are for gas checks. I have bought some of the LBT bullets that have a big flat nose, are hard, and are incidentally gas checked. I like the design, but the gas check isn't that important to me.
Maybe it's more valuable for cartridges faster than the 44 magnum.