The sky is really the limit now with the extremely slow powders hitting the markets. The powders I'm referring to are those needed in some of the large military Gatling guns and sniper rifles.

With the advent of the mono bullets, like the TTSX and GMX types, as well as the Nosler Monometal bullet and with their expected rise in popularity, only the imagination (or wallet and sanity) is the restriction on case sizes.

We might even see some of the old necked down .5 Browning case wildcats re-surface now with these 'slowest' of rifle powders.

Would the 7mm Nosler not use the 6.5 Nosler's case? I thought it different from the RUM case.