I'm thinking of picking up a Glock G36, but to learn to shoot this pistol well, I'm going to have to reload. I know that in the past there were issues about Glock chambers not supporting brass cartridge cases well enough to permit re-using the brass fired from the Glocks. Is this still an issue with the newer generation Glocks? Also, can I put together some paper-punching cast lead reloads and fire them through the G36 without changing the barrel to one with more conventional rifling? I've heard that the polygonal rifling in Glock barrels can lead to pretty severe leading of bores. Is this still an issue, even with relatively low mid-range velocities and well-lubed cast bullets with a Bnh of at least 16? I've been getting mixed information about these possible problems, and I need to know how much of an investment, beyond the cost of the stock pistol, I'm going to have to make. Thanks.