Another thing to consider herewith the 7/8 14 dies sets is the press alignment between ram and die mount. the frames strength and flex. THe best set of dies in a weak press with a ram off center wont load the very best ammo. A good solid press with accurate alignment is required. Something Ive been thinking about is a visual check for this. Loke the bars with 2 points to check scope ring alignment. A 7/8 14 bar with 60* point and a 7/8 rod with the shell holder base machined on it and a 60* point. install these in the press and carefully raise ram to almost touching, any mis aloghnment should be readily visible.
That's one of the benefits of the straight line dies and arbor press. The case and dies float freely to center and align. This is also a plus of the coax press the die floats in and out the shell holder side to side.
Niel Jones, Redding , warner will if you send 3-5 fired cases bore a die just for your rifle and chamber. These dies size right to what you need and little more. Expensive but again a custom fit and hand work. Its an option that's available