At one time Rossi produced a 5 shot 44Spl on a frame size simlar to a K frame .. I believe it was a Model 720?
Taurus built a 44Spl, 45Colt,40S&W 45acp & a 41 mag ... 7 shot 357 &
7 Shot 38spl with a Alumium frame
All on the same frame size ..all 5 shots , Close to a K frame size ..They. Beefed it up a little for a 44Mag , still a K or Med frame size .. I think the top strap had a bit more meat on it ..
The Charter Bulldog frame is close to a Colt D frame ....Charter offers a small close to J size frame Alumium (12.5oz) and steel frame (16oz) but lighter than a J frame .. Comes in 22LR,22mag
32H&R ,38spl
Then the Bulldog frame which is basically the same size , sans the larger cylinder ...
Comes in 6 shot 38spl, 8 shot 32H&R,
6 shot 380acp , 5 shot 9mm , 5 shot 40s&w , 5 shot 44spl
And then there XL frame ... which is still smaller than a K frame ..
Comes in 45acp, 45Colt & 41 Mag
All Charters share the same grip frame