So I hear a lot of talk about H1000 and Retumbo, but how is magpro? H1000 is almost nonexistent around here, but i was able to pick up some magpro. I shot tonight and the chrony consistently ran the closest speeds with it and my tightest groups were with mag pro. Plus my velocities were around 100fps faster than anything else. Tonight i was liking the stuff, so tell me the downside........temp instability?