I am in the process of acquiring a magazine box and follower for the 300 rum/375 H&H magnums.

I have a pair of long action Savages that I toggle back and forth with .473" and the standard magnums.

My understanding is that the throat of the long action has to be opened up for the added length of the ultra mags and old style like the .375 H&H for them to swing those cartridges out of a magazine.

So if I do that to one of my long actions does that preclude switching back to standard length cartridges and working their magazines out of it?

Best regards and thanks

Three 44s