The "Skeeter" load of 7.5 Unique/250 grain LSWC in the .44 Special is unlikely to appear in any loading manual as it exceeds SAAMI specs for the round. This does not make it unsafe, unless perhaps fired in the Bulldog or other "budget" handgun, because the .44 Special was -- way back when -- essentially a ballistic copy of the anemic .44 Russian. There is no real reason why modern .44 Specials should be limited to 15,500 PSI when even the .38 -- fired in all manner of sorry firearms -- is allowed 17,000. In point of fact, a lot of folks still use the old Keith load that uses enough 2400 to get the 250 LSWC going 1200 FPS -- approaching Magnum country in both velocity and pressure. This, IMO, is too much of a good thing for most guns, but it certainly has been used safely by a lot of folks for a lot of years.
Anyway, I'm wandering. The point is that 7.5 grains of Unique with a properly sized bullet of appropriate hardness is the "standard" .44 Special load, and is proven and safe. It is essentially a +P load for the .44 Special, and if approached with the same caution as +P .38 Specials will cause no trouble whatsoever.
HTH!