The load seems like a full power load to me.
You must remember that the original velocity per ICI/Kynoch was 2150fps. The original load was from a 28" proof barrel. On top of that, ICI/Kynoch lied on all their loads by about 30fps.
When you start cutting back barrel length, you lose 15-30fps per inch of barrel. Hence 23-5/8" barrels like this one, or the modern typical 24" barrels will regulate at speeds from 2050-2075 fps IF they are built to honor the same basic regulation of ICI/Kynoch load data.
So how come some guns regulate at 2150fps today? Answer: Because some of the ammo companies are run by idiots that know nothing about double rifles. They used faster burning powders that achieve maximum velocity in 24" or less barrels. All sounds well and good, except they are still gaining velocity in 26" and 28" guns pushing them to near 2200fps. So if an uninformed buyer orders a custom bespoke double rifle and asks it to be regulated to a case of built-wrong factory ammo, you end up with an absurd amount of recoil and you cannot get the gun to regulate with the correct loads.
Every storied book on Africa that talks about their Nitro Express doubles killing dangerous game at 2150fps with great results was just quoting the ICI/Kynoch advertising, they were slaying game with ammo leaving the muzzle at 2050fps and hitting at 1900fps or more.
This is why Pondoro Taylor summarized his findings simply: any bullet of 40 caliber or greater hitting an animal at 1900fps or greater will deliver results.
The recoil experienced in some of this modern factory ammo of today is far greater than the recoil of the original loads. I pity the vintage guns that are being subjected to forces they were not designed for when new.