If I was looking for something a tad harder, but not quite as much as a copper solid, I'd load the old Sierra 40 grain HP. According to their literature, it is intended for the faster 22's and may be a little too hard to expand at hornet velocities.
Actually the 40 Sierra HP works very similar to the polymer tipped stuff in the Bee and Hornet. The 45 SP Varminter (Sierra) however is a harder bullet and would be a good choice for a tougher-acting bullet without stepping into mono territory.
