Wait, so using old SRs that have gained levels or skill levels makes leveling other weapons' skills go faster?
I keep trying to save materials by feeding my weapons until they have like an 86% chance for success or so, but it keeps failing. So if I can recycle older stuff that would be a nice help.
I've also been hanging onto excess SSRs from events to use as upgrade material, too. ie. I have a MLB Cow Hammer from the last advent, but also got a drop so I planned to use that when a weapon is around skill level 18 or 19 to upgrade. Is that okay, or should I hang onto those?