Well, I shot just about the last of my Swiss 1.5 this weekend at our 2 day BPCR match. I have more on backorder,  but to get me through,  I was able to grab 3 lbs of Goex Cartridge and 4f from the back corner of my dad's closet. Still in metal cans, lot from 2003.

Unfortunately 3 l s isn't really enough to do a lot of load development.  My Swiss lot liked a LOT of compression,  83gr, compressed .27", with a 535 postel (reduced front band) got me the 42 shot chrono group below.

Does anyone have old records of how much the goex liked to be compressed that I could use as a starting point? Im planning on using 4f as the priming charge with the old powder

Start with the same volume as your 1.5 Swiss  as stated before. Weight that charge and mark the difference in weight. I use a muzzle loader dispenser to gage volume. Start from there . I haven’t use goex in a long time but I remember it being a lot
Harder in the boar after a shot than Swiss so beware of that.

My results in my 45-90 were just th opposite.  Swiss liked very little compression and back in the day Goex ctg liked a lot of compression.