Since this section gets more traction than reloading, I thought I would post this here, too.

I have an interesting Belgian made rolling block that is chambered in what appears to be .450-400 2 3/8. Might be 10.25x69R, but the custom case guy made me cases from shortened .450-400 NE cases. Anyhoo, the correct dies for this are ridiculously expensive, especially since this is a gun I would shoot a few times a year. The bore is .415 and I had bullets cast by the guy who made the cases. a quick and dirty seating of bullet proved that this combo will not chamber.

So what are some options I have? I have never delved into paper patched bullets, although all of the collector cartridges for this round seem to be just that. Do I need a neck reamer in order to even seat a proper paper patched bullet in these cases?

Now back to dies. Could I use a Hornady Die Set 450/400 NE ground down to properly full length size the shorter cases? I will admit to being a lazy reloader and when things get too complicated tend to just move on to something else.

Any tips or advise appreciated.