Alright this might be a dumb question, but i gotta ask it anyways. Am I safer to reload .40 s&w or 9mm. The reason I ask is because such a big deal has been made about kabooms and the glock .40 s&w. I plan to buy an xd(probably the m) and I am debating on which caliber to get. I have read speers warning on 9mm and that seating to deep can cause high changes in pressure, and I have noticed that the pressures on .40 s&w appear to be lower than with a 9mm. The only thing that has got me stumped is that all the kabooms with glocks seem to be with .40's vs. 9mm....so which would be better for a newbie to use...so far i have only reloaded .45 acp