Can someone please give me a definitive answer...

I bought a brand new TX200, it chrono end in the shop at 11.5ft lbs

Over time (since March) and after a couple of tins of pellets it has now crept up to 12.3ft lbs.

Someone suggested that it would come down again, and others say that it will continue to rise and then plateau over power.

What should I do?

Do TX200 come with washers that I could remove from new?

Thanks for your help...