+1
It seems as though each rifle will take to bedding, floating, or a pressure pad differently. Some like one way, while others don't. The real key is consistency. You want the barrel to react the SAME way from shot to shot.
I have some rifles that, after free floating, shot TERRIBLY. Otherse improved drastically.
As for your 925M.
Do realize the front action screw is actually attaching to the barrel an inch or so in front of the the action...
Marlin USED to claim their magnum rimfires were "factory free-floated" but they no longer do. I'm not sure why, but my thoughts are very similar to those of BritHunters....cheap wood WARPS.
I say this because I had to return the stock from my 917 purchased over a year ago (when they were advertised as free floating) because the barrel was pushing against the tip of the forend and actually causing the wood to crack--it seems as time went on, the stock was warping for no real reason. I would imagine they got a lot of complaints about their stock channeling, and quit advertising them as free floating.
I have an older 25m (1988) that is NOT floated. The wood fits tights on the sides of the barrel, but not very well under the barrel. This rifle also only has one action screw. All things considered, I don't dare change a thing because it will shoot 1" (occasionally better) 5-shot groups with the new Vmax rounds. I'm afraid of messing it up.
*Most* factory synthetics, especially those on lower end rifles (and rimfires) are VERY poor quality. The twist and bend when you snug the action screws, and will flex quite a bit depending on your grip. I dislike them a great deal.
If I were you, I would seal the ENTIRE stock with a good wood finish to seal in hopes of minimizing warpage.