jjohnwm, I hear you on that stock.
I have a similar stock that came on a Remington 700, and like your stock it got all sticky.
I got to thinking what else I had with the same issue and it came down to tires on my truck and a Remington Mountain Rifle with laminated stock and an Eze Trol (no idea who made it) butt pad which is very good at absorbing recoil but it's STICKY.
I found out it got that way when the previous owner cleaned off the "finish" and applied lacquer instead, which will be coming off when the days are cooler. 38+C temps and I don't even open the doors of my shop. It will stay cool in there for a month of this weather if I don't.
He used acetone and Circa 1886 stripper to take off the other worn finish and it reacted with the butt pad.
Anyway, I went up to the local car wash and when one of the customers came in right away, I implored them to let me put a toonie in the dispensing machine for them so I could get some of that "acidic soap" that's used by the Brush Wands.
This stuff is miraculous for removing everything from grease stains on clothes to road tar off the vehicle body, grease stains from the seats and floor carpets, and the list goes on. It's also excellent for cleaning tires of oxidation and sometimes that sticky goo which will suddenly appear for no reason.
You likely know all about that stuff but I only learned about it just before the Covid shut downs.
I got about a liter of that PINK FOAM from the Brush Wand, took it home, and by then, only a few minutes, it was already a liquid mix of the soap and water. Pre mixed is good.
I washed off the butt pad with this stuff and it ate up most of the sticky goo. Another application and it got rid of all of it.
That Remington stock I did, was pre-Remington bankruptcy, so no returns available.
I gave it a similar treatment almost three years ago and it's still fine.
I suspect it's just a chemical breakdown, brought on by UV rays from sunlight, or maybe someone soaked it in cleaning solvent?
Give it a try, it will only cost you a toonie and a bit of time.
Do not get this "soap" on the rifle's metal surfaces, especially the trigger guard, which is pot metal. It will turn everything a dull gray.