Stick,
Its a T3X UL in 6.5 Creedmoor. I was very surpised that 147s fit fine in the OEM mag. Its tight though and when I need to chase I'll probably run out of room. The MT bottom metal would probably be the best option since I already have a dozen or so accurate mags with and without binders.
Be nice to have a couple extra rounds in the belly with the AICs and the room to grow but was just looking at options.
