Dusty, yes it always amazes me when people want to go down the road with out seeing whats available jacket wise. its one thing for me to mess around after all dies don't cost me, but start adding draw dies and pinch trim dies just to a die set and things get pricey pretty fast not to mention all the extra work involved.
Roger this, George, even then, when the jackets (J4) were priced proportionally to other calibers, few people were/are willing to part with the $ for superior 25 Cal. (hand swaged) bullets!


Even following some wins, at the NBRSA Hunter Nationals (a pair of 200 Yd., and a GRand Agg.), my 25 Cal. dies have never, "earned their keep" . . . thankfully, I never expected them to - they were just a personal desire/investment - like a new rifle!
Unless one is a precision freak, shooting in registered BR tournaments, or, possessed by [the demons demanding] the personal satisfaction of maximum precision, it's difficult to beat Sierra. The folks at BjackJack are offering some seriously good 25 Cal.
heavy bullet options, along with reamers, and properly twisted barrels, at very reasonable pricing - I believe the bullets are made by Sierra.
For my own shootin', I'll continue to make my own 25s, as I have all of the necessary tooling, but when I croak, I suspect that the 25 Cal. dies won't be worth much.

To re-enforce George's gist: before you invest in odd-ball dies (caliber, or, odd length/weight bullets), make certain that you can obtain jackets to make what you want. AND, even then, purchase a BIG, if, not life-time
jacket supply . . . sometimes, quality, jackets can be difficult to obtain. Looking at unusable dies would frustrate even me . . .

RG