Re: Redding T-7 max
You can load 308 and 338 Lapua Mag on the T-7 just fine. I use my T-7 for both of these. For the 375 CT, 408 CT, and 50BMG, you will need a bigger press than the T-7. The dies are much bigger as well. I use a Redding Big Boss for my 375 and 408 size loads. It threads for the 1 1/4" dies for these calibers. You can load 50 on it, but you will need the 1 1/4" threaded Lee dies, and it will be a very tight fit on that press. For the 50, I would recommend a 50 cal press of your choice. Hope this helps.
Chad