Ruger Old Army Westlake Convesion loads needed

[harricook]

Evening All !

I’ve just taken a gun onto my FAC that I gave my Father many years back
It’s a ROA .45 in stainless BP with a second/additional/spare nitro cylinder from Messrs Westlake.

Dad passed away and trouble is I have NO idea what loads or powders Dad was using in the nitro cylinder.

If anyone that has same and has shot it with success, could give me a conservative start load - and which bullet or ball I would appreciate it !!
It uses standard #209 shotgun primers

Cheers All - appreciate your input !!

R