Which cut chart from the 45 XP book are using?
Depending on which cut chart you chose:
fine cut consumables high speed
fine cuts consumables low speed
I would you use recommend the fine cut consumables high speed unshielded cut to start.
Hypertherm cut charts are also in metric.
Here’s a post from a while ago where I did a 20 gauge stainless square to round.
Fine cut consumables work amazing on stainless.
Be sure to start with the book chart
Cut height on stainless is usually a lot closer and makes a massive difference in cut quality.
I would check your cut chart again it’s probably more like .1sec in the chart 325ipm 25am .02cut height .08 Pierce height. Because the pro can only do 300 in per second I would Max it out there.
I moved from a pro to XR and it is sure nice being able to type in .1 seconds and have it actually fire the torch unlike the pro. The trigger circuit latency is a good .3 seconds faster on the XR.