They'll be back.
Hornady will ship more when they run the ammunition again.
The 265 gr Superformance load is very popular, as is the bullet. They just aren't popular enough for continuous production.
I've seen this twice since I got into the cartridge in 2009. They'll be back.
That group looks like a windy day with my custom 336-444 and the Superformance load.
First bullet goes 3/4" high at 100 yd.
The rest of the magazine (whether 1 or 4) goes through the same hole, at the point of aim.
Nice group for the conditions.
That's one of the reasons why I like the cartridge so much. It doesn't suffer from "big bullet syndrome" like other big bores, where deviation from target weights, lengths, ogive shape, etc. is allowed to vary more than smaller bullets, because the percentage of deviation is lower.
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Most of the data using classic powders is older data.
There's some newer data, though. Newer bullets, like the 265 FTX usually have more modern powders listed than classic powders.