I've used CCI primers for 44 years. Never had a problem. Never saw a need to switch or try others.
Like Doc Rogers says - I have used CCI large magnum primers (CCI 350) since 1977 (almost as long as Doc) to load silhouette match grade and hunting rounds with H-110 powder and I have seen no reason to change.
"Therefore go and make disciples of all nations,... " Matthew 28:19
Handgun hunter since 1979 - haven't used a rifle since! HHI member #992, NRA, SCI.
I have used CCI primers in every handload I have put together, riifle, or handgun ... no complaints. But wondering if there are better options. What would you recommend for the 44 mag?
Do you have a chrono? It helps you get stats on a load you don't see on target. Let me clarify that statement. When I work up an accurate load with any powder in one of my 44 mags I get a velocity read with extreme spread and standard deviation. What I have been able to do is usually lower the numbers by switching primers or at least see if I am already using the best one. I have never had a problem with CCI mags as far as reliability or ignition. Although sometimes another brand of primers tweaks the load. I have found velocity variations such as CCI standard primers give me a certain velocity[1200 fps], switching to WLP the velocity seems to increase approx. +30 fps, and going with CCI Mag normally adds approx. +70 fps. According to my chrono there is also a velocity difference between the different types of mag primers. If I am going for top speeds CCI Mags almost always produced the top velocity.