Lar45,

I've talked to Fred about building a 475 Ultra. He has done the math and says it will have more shoulder than a 400 Whelen which headspaces with no problem and had had ne problem with his 411 Hawk headspacing. Check out the articles on his website at Z-Hat.com.

You won't see either cartridge on the store shelf, but it would be fun.

Snapper

Excellent, thanks alot.