I'm late to the thread, but after several years of looking, I found a stock Ruger 10/22M a couple of years ago.
Outside of a factory trigger at nearly 8 lbs, it was OK, but nothing to compare to my Magnum Research Magnum Lite 22 WMR.
Fast forward to about 30 minutes after getting the Ruger home and I had replaced the trigger with a Ruger BX trigger, the stock with a Boyd's laminate and the barrel with a stainless fluted Green Mountain barrel...
Now, that thing hammers...
It's heavy...but accurate and consistent...
Was the BX trigger an exact replacement, or did you have to do anything to it?