Here's my take...
Snowflake got .6 on a 244 on the PMBG +10 4/23. Somewhere in the middle she saw "green" between that 107 and 102. The cycle ran a tad long, and you shot .35 the following night into basically the same number. She almost went green again, but shot up over 100 points in an hour before the 12 hours was up, right? That was the beginning of a bounce, from two green or almost green cycles in a row.
Now at the end of that cycle, seeing the 295, we figured "heck, .6 worked on the 244 a couple nights ago, how can it not work this time? The difference is, that you were probably shooting into a bounce rather than a "normal" BG rise.
The result was a super long cycle, and I'd bet the farm she saw green, maybe low green, in between the 150 and the ugly 480. I think the 480 was an additional bounce because the .6 was too much the night +11 before.
Today, high and flat, which also is symptomatic of a bounce that hasn't cleared yet.
The very good thing is that you have not shot more than .6 into either of the red numbers. Because if you did, you would be "shooting a bounce", and you would most likely just keep getting "repeat performances".
A "too high dose" can do one of three things. It can go normal duration, with a quick or really deep drop, causing liver panic and a follow up high PS. It can also have a "normal" drop, but the cycle can run really long before the climb to a high number all of a sudden. Or, it can do both at the same time. Too low and too long.
I think the .6 was too much into the 295 because the 295 was the start of a bounce. Also, the difference between .35 and .6 might seem like just a tiny amount, but it is almost twice as much insulin into a number that was only 25% higher than the number the .35 was shot into.
My advice, I guess, would be not to increase the dose due to the higher PS numbers. Let the bounces clear on their own. And I'd say shoot .4 into a 300, not anything more than .4. When the bouncing clears, you aren't likely to see many pink PS's, and I don't think you'll have to fret about 400s either.
I would prefill my syringes as follows:
.2 for a number between 225 and 300 (maybe 18 of them)
.4 for a number betwwen 301 and 399 (maybe 8 of them?)
.6 for a number over 400 (no more than 2 of them) If the sitter sees more than 2 PS's over 400, she can shoot a .2 and a .4 at the same time. I personally don't think it will come to that.
That's my thinking anyway.
Anybody else?
Carl