I've been shooting gas checked cast bullets for a while now, but since gas checks are so expensive, I was wondering if it would be possible to use plain base bullets without sacrificing performance. As far as I know, the maximum pressure for 50 Beo is around 35,000 psi (correct me if I'm wrong) and a bullet cast from linotype (roughly 18-19 BHN) should be able to withstand that much pressure without a gas check. Has anyone done this before? I suppose if 18-19 BHN isn't hard enough, I could always water quench the bullets or even heat treat them in an oven for maximum hardness.