Jacketed data with cast bullets

Yes and no.

Yes, cast bullets realize lower pressures than jacketed bullets for a given load.

No, some loads specified for jacketed bullets don't work well. Sometimes the lower friction of cast bullets yields insufficient pressure for reliable powder burning.

There is a lot of explanations for both of those answers.

Use manuals that have cast bullet data. That is the safest route. Blind experimenting by beginners and using inappropriate data for cast bullets is just as ignorant as doing that with jacketed bullets and either kind of blunder can blow up firearms or kill you.

Your question seems like you may be a beginner to cast bullets. You can save yourself a lot of grief and lessen your risk of tragedy by purchasing good books and studying them. Then you can be much more specific with your questions.

The Lyman Cast Bullet Handbook 4th Edition and the Lee Modern Reloading 2nd Edition, studying BOTH of them is a great place to start.

Bullet fit to your firearm, alloy selection for your load level and powder selection are very important. Using gas checked bullets also greatly extends the pressure /velocity range of a given bullet alloy.

The best powder selection is not always fast powders. The fast burn and high peak of pressure works well for low pressure/low velocity loads in rifles and low to medium pistol loads. Slower burning powders with pressure curves that are much flatter give a soft start to cast rifle bullets that works very well with pressure and velocity limits of the alloy you select when you are aiming for top end velocity with rifle loads.

Gary