...of the three-inch barrel is precisely that it does use the longer ejector rod. The shorter ejector rod of the revolver with the 2 1/2" barrel will not produce a full extraction of the fired cases if you fail to use a technique that imparts sufficient momentum to the empty cases for them to fully clear the chambers.You will definitely need a longer ejector rod. Look at this picture below of my two model 66s with a 2.5 and a 3.0 inch barrel. The model 66 is almost identical to the model 19 except for the type of steel used.