Will echo some others here and says it's not the primers.
1. Headspace (my vote)
or
2. Primer seating depth (if repeated attempts still failed to fire, then see #1 )
or
3. Combination of 1 & 2
Have shot CCI primers half of forever, never had a misfire that was caused by the primer. It's always been one of the two above.
Pull a bullet or two, seat them out to jam into the lands fairly hard, try again. This may be your only 'fix'. Get a 'headspace comparator' to check your sized vs fired headspace (specific to THIS rifle.) Adjust your die to just bump the shoulder. Record these numbers (specific to THIS rifle).
Obviously, since you've reloaded for this rifle before, something has changed, and I don't think it's just a primer brand. Different die set up, perhaps?
Please keep us posted on any developments so that we can all learn. Keeping an open mind to 'WTH is going on here and why?' is almost always more beneficial than categorically stating that a component is bad without any testing. Please take that in the sense that it's given, which is to try and get to the bottom of the issue. No hidden agenda here.
Rich