This is an Idea, something that I can make.

But....every time I build a wildcat, it ends up being a 375 H&H or more powerful.

I have a Ruger and Falling Block Works "J". I need one just slightly bigger than the "J".

It uses a 3/4" x 1" block.

My original intent was to use 4140 pre-hard, but that was for 30/06 class cases.

This is for my own personal use, it will have a seam down the sides.

The front, drop block can be machined with a custom end mill.

So, my question is, Is 4140 pre-hard strong enough.

I have a professional heat treat only an hour away, if needed.

Suggestions Please.

Retired Tool and Die Mold Maker