Looking good , Mike.

Make sure you check the web in the stock between the magazine and trigger for cracks.
Mannlichers are bad for this, you may want to put a larger recoil plate behind the fore arm
screw boss and the front bedding screw boss, especially with the 375.
Don't ask me how I know this......

The RL-15 cordite multiplier works absolutely wonderfully with this cartridge and an old
Hornady 270 grain round nose.