two round shell holder

I was wondering if anyone had a good way of securing a two round shell holder to a stock? I have tried the type That is basically tape on and it doesn’t last holding my 338 edge shells out hunting. I would like to mount them by the action on a chaote stock. A better suggestion would also be very welcome. Thanks!

How about a stock pad like the Triad tactical or similar?
https://www.triadtactical.com/Triad-Stock-Pack.html

Thank you, much appreciated! I hadn’t seen anything that adjusted enough for my cheekpiece before. Look like it should work perfect.