Well I am sure you are correct in this statement, but the fact is that to forge a metal object that is subject to stress is the way things are normally done , on any component, once the "grain" of the material is cut by machining, then that is a weak stress point, if the component is forged, then there is a "grain" flow which follows the contours of the component shape, quite why a connecting rod manufacturer would choose to break with conventional knowledge I have no idea, I will certainly look into that . The fact remains that a machined action has been proven to be adequately strong, and as there are less operations it must be cheaper to produce, one only requires a CNC machining centre to produce an action body, also most cartridges used in Falling Block rifles, (and Doubles for that matter) use cartridges which develop relatively low pressure, that being an advantage when these guns are used in their normal environment, hence the reason for the very large, (by American standards),cartridge cases used with Cordite, the propellant of the day they were designed, and now a problem with "modern" propellants.