Txhunter, sadly Bullshop is closing up shop soon, according to a source on MM. I have 400 bullets left in .504 that I use in an UltraMag or I size them down to .501 with a lee die for everything else. The great thing is they fit snug into the omega and krb7 sized down to .501, unlike the loose fitting NEs. I tried paper patching the .504s for the White and it worked great for achieving a snug fit. I haven't tried BH209 with the paper patched conicals, but seems like it might work. Did you ever get the Omega to shoot with anything?