CFE223 seems to be a hard powder to ignite. When I tried it in 308, it worked fine in Lapua LP brass, but 50 test rounds in 'Palma' cases, 25 each with 155 and 178gn Hornadys were hopeless. ES values were all over the place, and two failed to ignite. Both primers had burned but like
@Clark I couldn't find any scorched or clumped kernels in the charge so ignition had apparently failed completely. Those that did fire apparently all suffered minor hangfires. It took me some time to identify what was happening - I knew something was as the rifle appeared to have developed a rattle. I stopped and checked everything over several times, but nothing was loose or broken and I eventually identified the sound as hearing the firing pin drop fractionally before the bang, the two sounds merging. Without electronic muffs amplifying the partial 'click' I doubt I'd have noticed it.
Ambient temperature wasn't an issue it being ~14/15-deg C (low 60s F), and the brass was on its second or third firing, fully fireformed to the 'minimum SAAMI' chamber and with the neck and shoulders alone sized using a Forster Bushing-Bump type die set up to provide 0.001-2" 'bump'. The primers, both large and small types in these tests, were Italian Fiocchi which I don't use often in SR form so they may be weak. They provided typical MVs though with Viht N150 in other 308 Palma brass loads.
I read somewhere that the Russian Murom primer manufacturer (Tula and Wolf brands in the US) introduced its 'SMALL RIFLE-223 Rem' SRM primer with a more powerful pellet for American XTC competitors who'd been getting FtFs or hangfires with its KVB-5,56M existing SRM type due to a new harder to ignite ball powder. I suspect that was CFE.
It's traditionally said that ball type powders are as a rule harder to ignite than extruded grades, but when Lapua 308 Palma brass first appeared in the UK over the winter of 2011/12 I tested them with various powder grades on a chilly winter's day running in the low to mid 30s F deliberately putting the cartridges out in a box with the lid open directly in a cold wind for some time before shooting, to see if SR primers would cause ignition problems in lowish temperatures and ~45gn charge weights. Whilst one extruded grade appeared to be adversely affected (reduced MVs / increased SDs) a 185gn bullet Hodgdon H414 'spherical' powder combination worked exceptionally well - better than its LRP equivalent and both in Lapua brass. The primer in these tests was the CCI-BR4. So it appears to be specific to CFE as a grade not necessarily the genre.
Other than in 308, I use necked-down Palma brass in 7mm-08 in a long FB F-Class rifle with excellent results with a compressed charge of >47gn Viht N160 year round.
I have seen a comment by one or two 243 Win using match shooters on the AS Forum of poor results with the new Peterson SR brass with H1000. I have a 6SLR coming shortly and intend to try reformed Peterson SR cases in it. The intended powder is Viht N165 which seems to be a very tolerant, easy to ignite grade, but I'll have to see how it works out on the day.