A User Equipment (UE) for a cellular communications system receives a Random Access Response (RAR) message comprising an indication of a time-domain resource allocation for a Msg3 transmission on a Physical Uplink Shared Channel (PUSCH), and determines a slot offset value, K2, for the Msg3 transmission based on the indication of the time-domain resource allocation and a PUSCH table. UE adds an additional slot offset value for the Msg3 transmission to the slot offset value, K2, to provide an increased slot offset value for the Msg3, and transmits the Msg3 transmission in accordance with the increased slot offset value.