http://ammoguide.com/gfx/web/compares/3030-to-357herrett.gif The more I think about this, it doesn't make sense. Logically, the .357 Herrett SHOULD be a descendant of the .30-30 and unless something else is going on, I would think this conversion would work. I believe I will try to verify AmmoGuide...

The AmmoGuide ReBarrel/ReChambering Guide (Use the 'no login' option if you don't have an account) says these rounds are all DIMENSIONAL candidates (some you would NEVER consider, but dimensionally, they fit):



Mike

AJMD429 said:
Here's one of the longer .357 ones I was referring to...