You could need to have your firing pin bushed but I didn't have to on the Savage 10/110. I think that if you look at a spent round from your rifle and make sure your pin is making dimples in you primer that are well centered, you won't have any problems. However, if your dimples are way off center you might have to get the firing pin hole bushed.
I have found the Lapua brass to be a big improvement over other brass. I won't go into a long detailed reply but One of the main reasons that the 6.5x47L is such an accurate cartridge is Lapua's use of the small primer. They decided to make the Creedmoor brass the same way because their goal is always accuracy. The other brass manufacturers chose to use standard primers because they didn't have to use different tooling, which would have cost more. Plus, they didn't want to have complaints from people with sloppy firing pins in their rifles. All of this was done at the expense of accuracy potential. I get it and most people don't care about squeezing every tenth of an inch of accuracy out of their rifle. Lapua does and caters to those of us that do.
Lapua brass yields higher velocities with a given load than any other brass. This helps to get higher velocities without compressing loads, which I don't like doing. When you're trying to shoot heavier bullets out of a magazine, this aspect of the Lapua brass is a BIG help. Plus, you just can not beat the quality and uniformity of Lapua brass.
It's inexpensive to have your firing pin bushed. You can easily send your bolt to a gunsmith and it's a quick process. There are lots of guys that offer the service with turn-around times of a week or less. It CAN help to get a little more consistency because you get consistent strikes on your primer.