25-20 brass made from 32-20 is not the same, it comes out shorter & the neck is slightly thicker. I bought some from the guy on here & quickly resold them. When the bullet is inserted into the case, the neck widened just enough they were too tight going into my Marlin 25-20 CL. The same thing happens with 32 Colt brass made from sized down & trimmed 32 S&W, the cases also tend to split after 2-3 firings.