Thanks for the info -- but to clarify, is the answer to my question as simple as "when you put more powder in, bullets go higher"? When you say chronos can fall victim, that's the first thing I think of (bullets hitting the "cloud screens" or whatever they call them).
Adding a little powder could endanger chronos that much?...
I mean, I'd be happy raising point of impact an inch or two at 25 yds, but chronos I thought were used at a distance of maybe 5-10 yds.
When you say the alternatives to 231 are cleaner, does that mean less build-up inside the gun, or less smoke, or both?