I won't do a 475 Linebaugh, but I might do a 12x33R.
I for a long time fancied a Martini Enfield in 50-90, the brass was hard to come by and some have stock piled it and want $5 a case. I like my odd, I am willing to do and spend on odd, but $5 for a piece of brass, when Starline sell it in the US for $1.75 AUD, it was too rich for me!