Ok, so it's gain until 72.3, but you need 97.3 to create them 100% of the time?
Or when you say "most" are 50 point range and crates start at 50%, do crate top off at 72.3 while others would top off at 97.3?
I guess I could go to test. Hmm...
You seem to have gotten the exact opposite from what I said, than what was meant.
Nearly everything starts at 50%, except Blacksmith stuff, a bunch of recipe items, and maybe a handful other items.
That means, for the items that have a 50% start point, the 50 range is effectively halved, as half of it is before the point where you can start making it. So, nearly everything other than blacksmith-crafted items will hit 100% (and no longer give gains) 25 points after you can start making it (20, for bows).
Blacksmith: full access to the 50-skill range for crafting, from 0%.
Bowcraft: Access to only half the 40-skill range, as 50% occurs at initial access to items.
All others relevant to this forum: Access to only half the 50-skill range, as items start at 50% to craft, resulting in a skill range to gain of 25 points (uo to 35 for tailors, if they have used a powerscroll).
Skills only gain, if the chance of success is less than the hard cap for the skill (100, without powerscrolls - which for crafting only exist for Blacksmith & Tailoring - we're not sure how imbuing PS affect that meta-crafting skill).
Skills that have a 50 range (all but bowcraft, for the "hard" crafting skill), gain 0.2% per 0.1 skill gained. that means that if the chance to craft starts at 0, one can gain up to 50.0 skill points higher than its base skill to make on such an item, before one stops gaining (without using a powerscroll) - but gains will slow to a crawl after 80% chance of success.
If the item starts at 50% chance of success, then the gain range is already half-gone, and that leaves the remaining 25.0 skill over the base to get the 50.0% success chance remaining (also, with the slowdown after 80% success chance).
Visualization:
If you treat each skill point (1.0) as a penny (1 cent), you can gain on an item until you have 50 cents. You start out broke as a smith, but all the other craft skills give you the first quarter (25 cent piece) for free.