Semper Fi Jarhead ! I don't think I've had a chance to welcome you to TFF, I've been a bit busy lately.
As far as primers go, if you are using a different brand of primer, always go back to the min loads and do a proper load work-up. Make sure you are using the same type of primer, ie small pistol and not small pistol mag if the load calls for small pistol.
Different companies use slightly different compounds and different cup variances, all can affect how a load will perform.
You'll figure out which primers you prefer, I prefer Winchester for my pistol loads and rifle loads are mostly CCI. I have loaded most brands of primers due to availability, don't hesitate to buy one brand if you can't find what a certain recipe calls for. Just realize that your load is most likely going to perform differently. (may be very slight or may be very noticeable)