I've been playing with shooting big 405 gr conicals out of my GM 1:30 twist barrel. I've been trying paper patched bullets and bare conicals. After several outings I've determined that the paper patched bullets do not shoot as well as the bare lubed ones. In fact group size using the bare bullets are about half the size of the PP bullets.
The target below is the best PP group shot followed by the bare bullets' group. Other covered holes are from other PP tries.