For the most part the CTI loads will fit in AT cases.
You must check the individual instructions to be sure, there are a few won't, for the most part they will.
Read the pic below right from the CTI website, all you have to do is go there and read up on it. Click on any re-load and read instructions for compatibility. If it comes with RMS/AT o rings..... it will.
All reloads come with both types of O rings, one set for CTI the other for AT.
This came about years ago after the AT fire. Many colleges and government agencies, needed re-loads for their 75 & 98 AT hardware, to continue with their research programs.
CTI was contacted and agreed to make them. At this point the only thing they made was 38's.
So when they decided to do Hardware them selves they made it compatible with AT....... so loads they already had, would fit.
The difference is:
AT hardware uses the O-rings in compression...like a garden hose.
Cti O rings fit in a groove in the nozzle & forward closure
Hence the need for 2 sets with every reload...so they can be used in both types of hardware & yes they are certified as such.
I don't know if At reloads are certified for use in CTI or if they fit. I do know the supplied O rings will NOT work.
I have used a few CTI M's in AT hardware myself.