Ruger forcing cone angle ?

Both of my Ruger Vaqueros in .44 Magnum and .44-40 have HUGE forcing cones in which the barrel forcing cone entrance is large enough to accept a .45 slug!  Both the .44 Magnum and .44-40 forcing cones accept a .44-40 cartridge case neck and all with free space all around it!  Inserting a .45 ACP Ball round into them shows the forcing cone is cut to normal dimensions for a .45! It is apparent that Ruger didn't change their setup when changing from .45 to .44 cal.  My two Vaqueros were built two years apart and are both cut this way.  

Interestingly the forcing cone on my .44 Magnum Super Blackhawk is cut much tighter, just like my  S&W Model  544.  

While a cavernous forcing cone is forgiving of sloppy timing and loose cylinder lockup in a worn out gun, it is not ideal for best target accuracy.  But in reality it presents no problem in terms of practical field utility.  One inch group spreads per ten yards target fistance with fixed sights is acceptable.  

The Ruger barrel extension protrudes only minimally into the frame opening so that the threaded barrel shank is very well supported. The oversized forcing cone is not a strength issue, and it doesn't lead either.  Accuracy is acceptable for a fixed sight utility gun. While comparing the forcing cone in my .45 Blackhawk convertible, to the Vaquero .44s, they seemed to be cut with similar tools. So, for curiosity sake I tried the .45 ACP and .45 Colt cylinders in both Vaquero frames, and found that they fit, timed and indexed fine in both frames, with acceptable cylinder gap.  

The interchangibility of computerized manufactured parts combined with the generous forcing cones does entertain interesting fantasies for emergency, expedient ammo use. Knowing from experience testing similar revolvers at the factory, I confidently knew that large frame Ruger single-actions are hell for strong.  Mis-rollmarked frames with .41 Magnum barrels on them, which were mistakenly fitted with .44 Magnum cylinders passed proof and targeting just fine, and were only tagged, “spits!”  When they got back to assembly the error was apparent when a .44 range rod wouldn't enter the barrel, and they had to go through accepted boxed units in shipping to find them all!   I could write a book, “Wild tales from the night shift...."  So, I decided to shot a few W-W factory 255-grain, standard pressure lead bullet .45 Colts and some midrange cast lead .45 ACP wadcutters in the two  Vaqueros just to see how well my  "Squeeze Bore"  .45/.44's performed in terms of velocity and accuracy.  Shooting soft lead .45s down a .44 barrel works much better than bouncing .44-40s down the .45 Colt barrel, but even those are good enough to stay in your hat, keyholes and all at across the bar room floor distance....

Kids, please don't do this at home! But I knew that inquiring minds would want to know.