Only talking about 2600 fps + velocities? Great! You can only talk to LBT about getting that performance out of cast bullets. No other mold maker or lube maker can promise satisfaction up here.
Water quenched WW alloy is fine, or oven heat treat and get the hardness up close to 30 for the best accuracy. But this high hardness isn't any good for hunting, unless it has a softnose to take the initial shock of high velocity impact.
Be sure to use LBT bullet lube. It works with loads that will blow a gun up if using most other so called bullet lubes.
If you want to get good big game performance, best to keep hardness no higher than 16 bhn, using wheel weight metal about 50% with 50% lead and water dropped. If you have a good barrel and properly fitted LBT mold you should be able to get this alloy up to 2600 fps, but I prefer to keep speeds down to about 2450 fps.
