Nope.. As long as the 150 grains is in pellet form. Triple Se7en pellets are reduced in size so their overall power potential is the same as the Pyrodex pellets. With powerbelts, I have never found that large a load as the most accuracte, but each rifle is different.

The Omega is a great rifle. While Stainless is nice, the blue barrel will serve you just fine. Is the stainless worth the extra money, well I personally do not think so. My White is Stainless but that is the way it came and for the price we got them for, it was more then a good deal.