Here in Australia Squires Bingham was a very cheap rifle in .22 LR and Magnum. They were seen as a cheap "ute/4wd" rifle and were cheap.
If you bed and float one of these especially the .22 magnum you'll get a very good surprise because as a shooter they respond to this.
You can't do much with the trigger assembly except to "stone" it as it's a sear type trigger so you'll be making it a bit smoother if anything.
My son's Stirling(Squires Bingham) .22 magnum was bedded and floated an dit will produce .66mm groups at 50yds,they may be cheap but they can produce some interesting results.