Copy over using the copy project feature.

[Garden16_]

I have shell project in JIRA sand box for which all the issue types have work flows and screens etc. I would like to copy over the shell project in to JIRA prod. Can I do it using Copy project feature in Script runner from sand box to Prod. 

Once copied over I can copy them to newer projects in Prod.

[Radek Dostál]

No, you need apps such as

 # https://marketplace.atlassian.com/apps/1211147/project-configurator-for-jira?hosting=datacenter&tab=overview

 # https://marketplace.atlassian.com/apps/1228366/project-configuration-manager-for-jira?hosting=datacenter&tab=overview

Jira doesn't support project config migration out of box (only issue data), and scriptrunner only works locally.

Unless you want to invest time into whether trials work, or find some other apps, and hope that they work and don't break anything (because configs generally can be harmful if done improperly), manually copying it over would be the best bet.

Workflow you can export to .xml format and import them to your production, but the import process is not perfect - it could create a duplicate of your customfields and screens if you have any such transitions (so if you have transition screens, you would want to clean up a bit afterward). Although validators, conditions, functions and properties should carry over fine, so this might ease things up a bit.