Remington has gone overboard in trying to make their stock trigger "tamper resistant." They're using a proprietary sealer on the screws now which requires heat to remove.
Rem. X Mark is factory is set at about 5.5 lbs. It's smooth, creep free for the most part, but WAY too heavy for bench.
IF you ever send the gun back to Rem. for service, they'll pull your "adjusted" trigger and replace it with another STOCK X Mark, and their wondeful proprietary epoxy tamper resistant locking compound.
I got a Jewell from Midway -- $228 for the HVR, w/ safety/bolt release. You want the safety and bolt release. (Bench Rest "BR" model is about $176. No saftey, no bolt release. Sets from 1.5 oz to 3 oz.)
Cost me $100 to have a Remington certified smith locally install it in a Rem. 700 Police, .308 Win. Stock requires some inletting. Trigger pins are staked into the reciever. It's worth $100 to not have the gun/trigger "bubba'd" by a slipped drift, etc.
The Jewell is a "drop in" unit. I could have done it myself, but have enough into the gun / optics that another $330 and a run into town works fine for me.
The Jewell adjusts from 1.5 oz (OUNCE) to 3.5 lb. Factory set at about 1 lb. and an allen key adjusts trigger weight w/o removing the action from the stock -- down to 8 oz w/o changing springs.
Adjust screws are set in nylon bushings and won't "shift." They're not "locked" and INTENDED to be readily adjusted. Jewell provides instructions.
Set up a Jewell at about 12 oz. and you'll wonder why you didn't get one sooner. Precise, consistent, no creep, no overtravel, and it's all readily tuneable.
Any review you read rates the Jewell as tops, over all the competitors. More money, but you get what you pay for.
Here's a link which illustrates the design. It's MUCH more sophisticated than the Rem. design. In the Jewell there's no bolt tension on the sear.
http://www.ada.ru/Guns/remington/Jewell/manual_en.htm