4 gallons is likely pretty dilute for the typical amount of specialty grains used for steeping, just something to consider as many folks will tell you that if your steeping volume is too great, you will run the risk of extracting tannins in addition to the color and flavor you're shooting for:
"In order to get the colors and flavors you want from your specialty grains, without extracting excess tannins, you need to do one of two things — either steep in a small amount of water or in weak wort. A small amount of water means 1–3 qts. of water per pound of grains (2.1–6.3 L/kg). If you steep in a larger volume than that, add malt extract until the specific gravity is over 1.010 before adding the grains. And finally, rinse with a very small amount of water — 0.5–1 qts. of water per pound of grain steeped (1–2 L/kg) works well (see “Steeping,” in the May–June 2005 issue of BYO for more on this topic)."
BYO - 10 Steps to Better Extract Brewing