Before the introduction of the Magnum rifles, the old inlines used to shoot 100 grains all the time and do the same distance shooting they are doing now. White tail deer are not that hard to penetrate. If you have an accurate load with 100 grains and a good bullet, and can place your shots, there really is no need for the 150 grains of powder. I shoot loose powder and my favorite load is 110 grains of Triple Se7en 2f and a Nosler 260 grain Partition out of my Knight Disc. I would have no doubt that with that.. 200 yards would be a possible shot, IF I PRACTICED MORE AND WAS SURE OF MY ABILITIES.

What bullet are you shooting? Have you ever tried to shoot 150 yards and see if you can place your shots?