In
Handloader #236, there's an excellent article by Brian Pearce on loading the .44 Special to different levels for different strength guns. You can buy back issues from wolfe Publishing.
He shows loads on page 37 that would be appropriate for your gun. HE worked these up in a New Century Triple lock that is even older than your gun.
200 gr RCBS-200-FN cast
5.5 gr Red Dot- 922 fps 16 es
8.0 gr Universal Clays- 1,055 fps 29 es
240 Hornady lead swc
5.0 gr Bullseye- 802 fps 18 es
5.0 gr Red Dot- 816 fps 16 es
5.5 gr 231- 804 fps 21 es
250 Lyman 429421 cast swc
7.5 SR-4756- 856 fps 25 es
8.0 " " 932 fps 27 es
7.5 Power Pistol- 921 fps 18 es
8.0 " " 978 fps 14 es
8.5 gr AAC-5- 859 fps 26 es
9.3 " " 929 fps 28 es
6.0 gr Universal Clays- 779 fps 23 es
6.7 gr " " " 875 fps 21 es
6.0 gr Unique- 788 fps 26 es
6.9 " " 918 fps 23 es
5.5 gr 231- 760 fps 16 es
6.0 " " 829 fps 20 es
There were other loads listed too, but these should give you a guidleline to start with.
