I'd suggest you get a few 1/3 moon clips from Ranch Products. They should fit ANY model 25 and have the added advantage that they allow the "clipped" ammunition to sit in an ammo box. They're also just a bit easier to load and unload.
Mark Lane to William Buckley: "Have you ever referred to Jessee Jackson as an ignoramus?"
Buckley: "If I didn't, I should have"