Aside from bullet length, a lot depends on shape and also on the elevation and temperature where you shoot. Higher elevations and temperatures allow bullets to stabilize more easily.
Then there are the bullets themselves: Companies do put out relatively unbalanced batches now and then. All of this is why computer programs for calculating twist rates don't always work. Any little fault in one batch of bullets can prevent them from stabilizing in a twist that normally does the job well. I've had batches of 53-grain TSX's and 60-grain Partitions that wouldn't shoot consistently in 1-14 twists, while other lots of the same bullet would.
In general, however, just about any bullet up to 55 grains will do OK in a 1-14 twist, but 60-65 grain bullets can be iffy, even if they have shorter ogives supposedly designed for slower twists.
