Boy, no rest for the wicked!
Here's the two actions, No.1 at the top, No.4 below.

BTW, I agree the SMLE action is a good low-budget candidate for upgrading to a larger-bore medium-pressure cartridge. I re-barrelled one to take a wildcat .375 on the .444 Marlin case, kinda like the .375 JDJ but without the Jones royalties!  It shoots a 270gr Hornady at 2270 fps for over 3000 ftlbs ME. It has taken numerous large boars with that load, and 3 buffalo with 285gr Grand Slams to date. Not bad for a 'smelly', hey!
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