Ramshot's data shows a 140-gr Partition going a little under 2800 fps at about 55kpsi using Magnum powder. 24" barrel, IIRC.

I do not know what twist would be required for 140-gr bullets of various types. Berger lists minimum twist rates for their bullets, and the VLD types are probably longer for weight than other jacketed lead core bullets, such as Partitions, so a slower twist might be OK for shorter ones.