Thanks for the L numbers, I didn't know them.
Radway Green were involved with HK in developing the 4.6x30 and carried out the initial production, but when other ammo manufacturers joined in it became uneconomic (RG are only interested in orders with lots of noughts) so they stopped making them years ago.
AFAIK 4.6x30 ammo is made by RUAG, Fiocchi, Sellier & Bellot and Hornady. Allegiance Ammo in the USA are also marketing some loadings.
The official loadings developed, as listed by HK, are the following:
Ultimate Combat (2 gram copper-plated solid-steel) which is the current standard, replacing the earlier Combat Steel (1.7g); Copper-plated Lead (2.5g); FMJ (3.2g); SP (2.6g); Police (2 g "solid deformation bullet"; penetrates soft body armour, plus expands); Spoon nose (1.7g); Tracer (2g; Subsonic (5g); Copper training (2g solid copper); Hard Frangible (2g sintered metal powder for training); Soft Frangible (2g moulded plastic/metal dust, for combat use where penetration needs to be avoided); Blank; Drill.
The "Action" designation is used by RUAG for their version of the Police round (ACTION SX - Sintox non-toxic primer, lead-free copper/zinc expanding bullet weighing 2.0g and fired at 690 m/s; will not penetrate more than 30 cm of ballistic gel at 25 m). They also make AP SX (copper-plated steel bullet, same ballistics); FMJ SX (lead/tin core in steel jacket plated with copper alloy; 2.6g at 620 m/s); Training SX (tin alloy frangible) and a blank round. A copper-matrix frangible round is under development. I suspect that RUAG are the current suppliers to the British, who have recently relied on them for 5.56mm ammo while RG is out of production.
I doubt that ayone has made the spoon-tip - the British wouldn't buy it, for legal reasons (It is expressly forbidden to employ arms, projectiles or material calculated to cause unnecessary suffering such as irregularly-shaped bullets.
[United Kingdom, The Law of War on Land being Part III of the Manual of Military Law, The War Office, HMSO, 1958)
RG has been making nothing but 5.56mm and 7.62mm for some time. They aren't actually making anything at all at the moment, since the ancient small-arms factory was flattened a couple of years ago. It has been rebuilt, but won't be producing any new ammo for some months yet.