i was wondering what people are talking about when they say they are "trueing-up" the actions?
All solid front locking bolt action rifles share the same problem, manf tolerance allows some misalignment between the lugs and receiver. between the receiver and the barrel. For those looking for the most accuracy, they will also concern themselves about the slop between the bolt body and the action during the firing sequence.
Rems require some machine work to get these alignments back true and for desired lug contact with the action. That is what truing in a nutshell is.
If you look in the Gunsmith forum, Guntech has a post and pics of his new mandrel truing set up. Will explain everything you need or want to know.
Some will even go to shimmed or fitted bolt bodies to remove any bolt movement during the firing sequence. Essentially, they have a superb tight lock up identical to pure custom actions. Certainly adds a few $$$ to the build cost.
I have used many Rems and other actions over the years but now use Savage and Stevens actions exclusively because their unique design doesn't require the same amount of work to make shoot.
I have used both shouldered and barrel nut headspacing with zero work done to the actions. All of the actions I have used, have near full lug contact and solid lockup. The floating bolt head allows me to get away with quite a number of 'sins' yet still leave a super accurate rifle.
The barrel nut install allows one to install prefit barrels in the comfort of their own home and have fantastic results (1/4 min is not out of the question).
I use the Savage/Stevens actions because they allow me to mix and match with little cost and performance equal to a fully prepped and shimmed Rem.
Not bad for a $300 rifle that results in a $200 bare action that just needs a quality barrel installed to shoot very well.
Jerry
PS, if looking for barrels and parts, give me a shout.