Ok seems the bulk roll is fine, I took a strip of it out in the dark, developed it, and it came out clear. I traced my step back, and I found the culprit to be this plastic reloadible cartridge with a twist off bottom cap. It probally had it's felt wear down or something other because when i rolled the back strip up, the lines were pretty corresponding to the shape. Did another flash/sharpness test again, this time exposed for ISO 25, set the flash accordingly and had the Canon P on X, could only find a development time with HC-110 for "32 to 64" for 6 to 12 minutes with HC110 dilution F (1:79), so i figured I'd roughly guestimate that I should do something like 1:120 for 6 minutes at 68F, and use 400 ml of total volume ( as opposed to 200 ml) to avoid possible exahaustion of the developer early. The negatives are drying right now but i think i nailed the dilution/time on the head.