Here is load data for .44 Special, using South African Somchem powders, and copper jacketed bullets. Scale used was an RCBS 1500 , chronograph a CED M2.

If there is a six-shot .44 Special out there that that makes the weight, you can use the SSR factor. A model 29 Smith is heavier, and needs to be in ESR.

If you choose to duplicate any loads here, or use these loads as a basis for your own, use 10% less powder and work up from there.

Do not attempt any of this if you have no chronograph to verify bullet velocity.

Caliber	Barrel	Case	Primer	Powder	Bullet	Charge	AOL	Velocity	Altitude	Temperature	IDPA Factor
.44 Special	4"	PMP	PMP	MP200	245 gr CMJ	6.1 gr	36.6 mm	538 fps	1700 m / 5100 ft	26 deg C	131 810
.44 Special	4"	PMP	PMP	MP200	245 gr CMJ	6.3 gr	36.6 mm	574 fps	1700 m / 5100 ft	26 deg C	140 630
.44 Special	4"	PMP	PMP	MP200	245 gr CMJ	6.4 gr	36.6 mm	593 fps	1700 m / 5100 ft	26 deg C	145 285
.44 Special	4"	PMP	PMP	MP200	245 gr CMJ	6.6gr	36.6 mm	611 fps	1700 m / 5100 ft	26 deg C	149 695
.44 Special	4"	PMP	PMP	MP200	245 gr CMJ	6.8gr	36.6 mm	637 fps	1700 m / 5100 ft	26 deg C	156 065
.44 Special	4"	PMP	PMP	MP200	245 gr CMJ	7.0gr	36.6 mm	675 fps	1700 m / 5100 ft	26 deg C	165 375
.44 Special	4"	PMP	PMP	MP200	200 gr CMJ	7.8gr	36.6 mm	744 fps	1700 m / 5100 ft	15 deg C	148 800
.44 Special	4"	PMP	PMP	MP200	200 gr CMJ	8.5gr	36.6 mm	823 fps	1700 m / 5100 ft	15 deg C	164 600
.44 Special	4"	PMP	PMP	MP200	200 gr CMJ	9.0gr	36.6 mm	883 fps	1700 m / 5100 ft	15 deg C	176 600
.44 Special	4"	PMP	PMP	MS200	200 gr CMJ	6.5gr	36.6 mm	593 fps	1700 m / 5100 ft	15 deg C	118 600
.44 Special	4"	PMP	PMP	MS200	200 gr CMJ	7.0gr	36.6 mm	759 fps	1700 m / 5100 ft	15 deg C	151 800
.44 Special	4"	PMP	PMP	MS200	200 gr CMJ	7.5gr	36.6 mm	833 fps	1700 m / 5100 ft	15 deg C	166 600
.44 Special	4"	PMP	PMP	MS200	200 gr CMJ	8.0gr	36.6 mm	894 fps	1700 m / 5100 ft	15 deg C	178 800

The last two strings of MS200 gave visible flash from the cylinder gap, and it seems like there was much more muzzle blast compared to the last two strings of MP200. It's pretty clear the MS200 burns much hotter, with a lot more gas being generated.