The Oregon Trail Bullet Co (Laser-Cast & the Silver Bullet guys) have a new loading manual for their super-hard bullets which includes THREE separate sections of .40 S&W data.
You may find their data for "long-loaded" .40s interesting. Feed reliability in M1911s is apparently better if they are loaded out longer than SAAMI specs.
At the risk of violating copyright, I'll share one published load with the powder of your choice.
OTBC lists NO "major" .40 S&W loads for unsupported chambers, but several for both supported chambers at std OAL, and for long-loaded. They tested their velocities in a Para-Ordinance, IIRC.
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