I have some Remington Rolling Block rifles in 225 Winchester.
Your local gun builder buddy who thinks the 225 Winchester
was unsafe in that action is absolutely right.
If you take it to a profession to have it re-barreled they may
not do it if they know what they are doing.
The gun has been way over stressed.
I know that is not what you wanted to hear. I know that
some people will say do it anyway just for the money or
because they don’t know better.
If you must do it, and I do expect you to, then for your
own safety and anyone who might inherit it or however
it may fall in to the hands of others, do it in a low psi