A couple of observations on the above posts:
In June 2009, I reported some hangfires in working with light-bullet loads, including with CCI BR-4 primers and Lil'Gun, . These went away when I switched to Win SR primers.
On their first, handwritten reloading data sheets (see Knowledge Base in this Forum), Hornady shows Win SR primers being used with all powders, including 296. I have not checked larger cases extensively, but Hornady likes the regular Win SR primers for smaller cases like 22 Hornet, 218 Bee, and for the 30 Carbine; I recall reading that 296 was developed for the Carbine.
The results in the first post are puzzling, and are worth exploring. If ebg3 switches primers for the next set of loads and gets no hangfires, we're still left wondering whether the hangfire problem was caused by the primers, or by a glitch in reloading that did not happen when loading the new primers. I'm not suggesting that ebg3 do further trials with the CCIs, because there is some possible hazard with hangfires.
--Bob