The 25-06 is a BIG case for that light bullet.! Also ,I read some where that WW760 is NOT a good powder in the 25-06. I have not tried it and can't find the article now, so be aware there HAVE been problems in the past. my 4th edition Hornady manual shows the 60 grain bullet with 760 powder in the .257 Roberts Improved getting 3800 fps. Maybe a call to Hornady will shed some light on this.