I shot that same LaserCast bullet for the first time Sunday along with some other Lee- and RCBS-moulded bullets I was comparing for accuracy from my Savage 99F in .308 (22" barrel). The LaserCast bullet is shaped to take a gas check just like the other two, so I just tapped some checks onto them for consistency's sake. Seated to just below the top lube ring, they shot the same as the others--very well, with no leading--over 18 grains of 2400.
Try them as-is and let us know how they do. You can always gas check them and go for high velocity without any problem, I feel.