I had a Marlin XS7 .243 that started out being the worst, and ended up being the best. I wanted a reliable, cost effective, all purpose centerfire to use out here on our ranch, and this was perfect, especially with the synthetic stock. Out of the box, it shot 3 to 5 inch groups @ 100 yds. with the Federal 85 gr. BTHP. I was really disappointed.
They make these guns with pillar bedding - just a little place where the barrel rests on a little bridge in the stock.
It turned out that besides the pillar, the barrel was also touching the stock in a couple of other places. I got out the Dremel and removed that pillar, then sanded out the groove until the barrel was completely free floated.
Presto: it started shooting inside of a dime, all day. It's a perfect rig for everything from marauding foxes to deer and hogs.