[Magnum Wheel Man]

my retired gun builder, used to be a machinist for Herters... & according to him, Herters never had a Herters Atomic... if the guns were chambered in 357, they might have been marked "Atomic" because the gun could handle the hotter loads

but he also thinks the "Atomic" was a model of gun made by Great Western, & the Great Western Atomic was just a loading of the 357 magnum...

I have a Dan Wesson in 357 max though, & the cylinder is quite long in comparision to the "normal" mag cylinder...