I would imagine a 25 acp casing doesnt stretch a whole lot maybe by a few thousandths before you hit the max length, all of my info shows nothing for case trimming the 25 acp if you know what the trim length is supposed to be I would try using a deburring tool might work to trim just a couple thousandths off, on the other hand might be more of a hassle then its worth all together. what kind of brass are you using? I would consider using a harder brass like winchester should beable to get a few more loadings before the case needs trimmed. with my 357 magnum loads if i use federal brass I can load the case twice before it needs trimmed but with winchester brass I can get 3 and sometimes 4 loadings before it needs trimmed. good luck