375 H&H in 416 Rem Mag magazine? (Blaser R93)

Forgive me if there is a more suitable place to post this.

I’m on the verge of scoring a 375 H&H Safari barrel for my R93, but the magazine insert is not included… I have a 416 Rem Mag barrel already, surely the 375 should work in the 416 magazine?
 
I'm still waiting for a confirmation but I have checked the dimension as I don't have a 375 round to check but it is essentially a slimmer version of the 416 and if anything should feed easier.
 
If you remove the magazine insert its usually written on the side what calibres that magazine is suitable for.
 
Not the best of images but don’t look like the same mag but it doesn’t mean it won’t work.
 

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If you remove the magazine insert its usually written on the side what calibres that magazine is suitable for.
Yes and no. I've got multi mags. Som have just one, some have several including the barrel I bought. Very strange but probably to do with the timing of new calibre runs.
 
First picture .375 insert with 2 rounds
Second picture.416 insert with 2 rounds
Third picture .416 insert and barrel rounds feed and eject perfectly. Ammunition .375 PPU 300 grain soft point which I use for larger deer and competition shooting. ( just in case I cause any pedantry the feed test was conducted with a safe backstop, not the kitchen wall!)
 

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First picture .375 insert with 2 rounds
Second picture.416 insert with 2 rounds
Third picture .416 insert and barrel rounds feed and eject perfectly. Ammunition .375 PPU 300 grain soft point which I use for larger deer and competition shooting. ( just in case I cause any pedantry the feed test was conducted with a safe backstop, not the kitchen wall!)
Thanks a lot mate!
 
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