Now that's what I'm talking about. There are alternatives.
I'm currently doing range tests on H4895/VarGet alternatives, neither of which can be imported into Europe any more. Using a 223 custom F-Class rifle and 77gn SMKs, I've identified 27 possible alternatives to this pair. Four are Europe-only powders leaving 23 re this topic. There are eight US available ball-types and 15 US available extruded / tubular grades. However, you have powders that we don't from IMR (other than the Endurons), older Hodgdon and Winchester ball grades, and Western/Accurate powders.
Not only are there alternatives, but there are LOTS of them. The issue seems rather to be which of them are in stock!
Of those we have, my favoured replacements for VarGet are:
Viht N140, 540, N150 (but not in 223 with bullets lighter than 90gn), N550.
Lovex S-062 (Shooters World 'Precision'). A bit slower burning than VarGet.
Alliant Re15 / Norma 203-B (same thing). Temperature affected though in North American environments.
I won't get around to the ball types for some months, but Ramshot TAC is widely used here as a VarGet replacement.
Re TS 15.5 is (literally) coming to us, but has yet to reach our outlets.
IMR-4166 Enduron is a viable H4895 replacement and gives excellent performance in terms of ES/SD and groups, but IME pressures out at lower MVs than either H4895 or VarGet. I've seen a few similar comments on this forum. Hodgdon aside, I've yet to find a single pressure-tested data source for this powder in 223, although manuals have plenty for it in larger case cartridges such as 308 Win and 30-06.