When I am given the choice I shoot marbs.
You might want to consider picking up a small bore barrel and have it turned for an SL. I did that with a spare phantom barrel I had and I couldnt believe the accuracy from it. However the phantom barrel bore is just slightly smaller than a stock SL.
A link to my mod. http://z1.invisionfree.com/forums/St...opic=19715&hl=