Hi Jordan and welcome. Slugs are no issue through all but the full choke. Foster Type Rifled Slugs are recommended for best performance and accuracy. Cheers, stay safe and enjoy!

Good evening to you!! You should have no problems shooting slugs from the CZ Drake Southpaw. Foster style slugs are recommended. Hope this helps. Have a good rest of your day.
🇺🇸🇺🇸 'merica' 🇺🇸 🇺🇸

Hi Jordan, you can shoot slugs with no issues, just don't shoot slugs through a full choke. Improved cylinder usually gives best results for slugs. This comes with 5 choke tubes - Full, Improved Modified, Modified, Improved Cylinder, and Full.
Stay safe & have a great day!