358 Win, 375 Win, 416-08, 44-08 just about covers calibers larger than 30. There are more below that size than above. There just isn't enough powder space to make effective large bore bullets go fast and far enough. Bullet selection suffers too so you are restricted to heavy bullets - With the available powder space you can't get enough slow powder behind the heavy bullets to make them good performers. The faster powders just build pressure too fast to make velocity. It takes horsepower to go fast or push big bullets and you just can't fit enough hp in that little case.
