My Swiss K31 has been having something funny going on with the trigger the last two outings. The two stage trigger will work as it should then the next shot first stage will fire with barely touching the trigger, I'm guessing under one pound of pull, I don't like it one bit. I've owned it since 2005 and when I bought it was torn down and cleaned. First time this happened was about a month ago at near freezing temps. I came home and stripped the bolt, scrubbed it clean with brake cleaner and solvent, greased it well and put it back together. I then checked trigger pull weight, broke relatively consistent and clean at 64 oz for about 5-6 times, then it happened again, fired on start of first stage and didn't even see the scale on gauge move(tells me the sear had barely engaged the cocking piece- so trigger problem). I removed the stock and sprayed the trigger group out with brake cleaner, it was filthy gummed up with what I figure was dried out solvent, Hoppes #9, and 3 or 4 kernels of a stick powder. I put it back together and gave it a dozen dry fire runs, perfect I had fixed it so probably should not be any oil used on that trigger. Now fast forward to last Sunday, on shot number 15 it happened again, I do not like a trigger that isn't the same every shot, scares me! I just got through full cleaning routine again with bolt and trigger, this time looking over sear engagement surfaces with magnifier and light, nothing I can see wrong. I sprayed the trigger assembly with Amsoil MP, put it back together and as usual the second stage trips at a clean 64 oz, same as it does bone dry. I removed the bolt and look into rear of the receiver, the sear retracts approximately 50% of travel with first stage of pull, trigger always fully resets forward bolt in or out, cocking piece looks to have a measured engagement of .050". Anybody else have something like this going on with the K31, any help would be appreciated, my daughters and wife shoot this rifle but no longer until I have this figured out.