In its day, the Westley Richards 20-bore Fauneta was advertised as being the most effective gun of its type, in terms of both accuracy and ranging power. It propels a 425 grain bullet at a higher rate of velocity than either a .256 Mannlicher or a British .303 rifle and was capable of grouping ten shots (firing right and left barrels alternately) within 4in. at 100 yards. In an advertisement published in 1919 the following testimonial from the Private Secretary to The Maharaja of Dhar was used to promote its effectiveness in the field:
'It will interest you to know that her Royal Highness The Maharani Sahiba of Dhar has recently shot a Tiger measuring 10ft. 4ins. with your 20-bore 'Fauneta' Ball and Shot Gun, which H.H. has been using for some time. It stopped the animal with one shot.'