hvayāmahe tvac-chravasā hata-tviṣam
prasahya rājan juhavāma te ’hitam
By chanting the Vedic mantras properly in a sacrifice, one can perform many wonderful things. In Kali-yuga, however, there are no qualified brāhmaṇas who can chant the mantras properly. Consequently no attempt should be made to perform such big sacrifices. In this age the only sacrifice recommended is the saṅkīrtana movement.