Hodgdon has lots of data for 160-grain bullets, all with slow powders. Velocities range from ~ 2500-2600 fps. QL is a mathematical model, not data. I'd start with powders like RL-19, RL-23 or RL-25.
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What version of QL are you using?
RL 25 at 100% fill will get you ~2400 fps at 40K psi even though the 260 is a 60K psi cartridge...good advice.
