Recent experiments performed at Imperial College on the pulsed-power magpie facility have successfully shown the formation of magnetically driven radiatively cooled plasma jets formed from radial wire arrays, which are relevant to the study of launching mechanisms in astrophysical jets. The experiments have been now extended to study the episodic ejection ( ∼ 25 ns) and the interaction of jets and magnetic bubbles with an ambient gas. The dynamics of the interaction is investigated through three-dimensional resistive magneto-hydrodynamic simulations using the code gorgon . Comparison with experiments is offered to validate the results. The ablation process as well as current reconnection is described and analyzed. The complex three-dimensional structure and the confinement/collimation effect offered by the magnetic field are investigated. The scenario is modified introducing a background gas (Ar, ρ ∼ 6. 7 ×10 − 3 kg/m 3 ), collimation effects are investigated for the new set-up.