Tikka Red Snake Tactical bottom metal and 300 WSM question

[Lead Slanger]

It's about time to start gathering parts for my Tikka 300 WSM build. I was looking at a Red Snake Tactical bottom metal for it.

https://www.redsnake-tactical.com/blogs/news/solution-for-extending-oal-for-tikka-wsm-rifles#:~:text=1) Order either of our Tikka T3,to long-action by replacing the bolt stop.

In the article, it states that they recommend using the 3.715 length MDT 300 WM or 338 LM magazines. With the WSM case falling right between the WM and the LM in diameter, which magazine would you recommend? Have any of you had any experience with this bottom metal in a Tikka?

Thanks