.454 slugs in .457 Texan

Anyone that finds 457 ammo to be the correct size should consider this as an option. Buy 454 or maybe 452 ammo, clean it, and powder coat it. You should get right around 457 from the 454 bullets. That 0.003 of plastic might help them chamber too.

As far as Walther barrels being one of the best, there are a few of us with .510 barrels that would disagree.