Nothing was reinvented. I was familiar with, and considered, those cartridges for use in the Marlin rifle. I went with the .405 (.411") instead of .416" because of the limited overall length restrictions of the Marlin. Bullets available in .416 are 400gr and they are too long for the Marlin rifle. But the 300gr .411" bullets made for the .405 Winchester were a perfect fit, to include the location of the bullet's cannelure ring. It was necessity that drove me to use .411" instead of .416".

I am already down the road with the Marlin. Now, here I am with a reamer, a pile of .411" bullets, and a Siamese Mauser. For me the next road to take is clear. Perhaps a Mosin is down the next road after that one.