A rank of 299,921 in JEE Mains is quite high, and securing admission to a government college in the general category might be challenging. However, there are a few factors to consider:

1. State Quota: Some government colleges may have a state quota for residents of the state, which might lower the cutoff for you. You can explore colleges in your home state.

2. Other Categories: If you belong to a reserved category (SC/ST/OBC), the cutoff ranks are generally higher, which could increase your chances of admission.

3. Lower-Tier Government Colleges: You might still have a chance in less competitive government colleges or in branches that have a higher cutoff like Civil Engineering, Environmental Engineering, or other non-CSE branches.

4. Management Quota: Some government colleges also offer seats under management or institutional quotas, where the cutoff ranks can be different.

It’s advisable to keep an eye on the counseling process and explore colleges that might fit your rank and category.

Best engineering colleges in India