I purchased a rifle just like you describe and found it to work well but it did have a few troubles. The stock split after several hundred rounds (nothing serious). The Warne QD rings require that the scope is not centred and as a result, the reticle broke. As mine was one of the very first 550 American Safari models the length of pull was around 14.5 inches.

I had the action bedded and the forearm block as well. I added 2 cross bolts and had all the bolts set with red locktite. The blue stuff gives up very quickly. I no longer use Warne QD's. They are strong but on a heavy kicker unless the scope is centred, there will be trouble. The scope in question was a Leupold 2.5 lightweight. A slight shortening of the length of pull to 14 inches and the installation of a Limbsaver recoil pad finished the job.

The gun feeds like a garbage disposal unit, shoots very accurately, and is light enough to carry all day. With open sights I can put 3 shots into a 3 inch group at 100 yards off the bench.