Yeap, looks like what would go on to be known as “Sharpshooter”. Excellent photos there!!!
It would appear that during the time between 1892 and 1900, the US Military testings would settle on a few powders to be used in the .30 cal small arms rifles. The military testings used Wetteren Smokeless Powder as the bases to develop a suitable smokeless powder for that caliber. Eventually Leonard Powder, by then owned by Laflin & Rand, appeared to formulate a disc powder like that in those photos. Although I do not know what the powder was called under contract with the government, Laflin & Rand offered to the civilian market, “W.A. 30”. Then appears to offer the powder as Sharpshooter. Changing hands the name went on as Dupont’s Sharpshooter (carrying on the Laflin & Rand logo “Flag in Wreath”) till being turned over to Hercules, also as Sharpshooter. The Sharpshooter mentioned ran from 1897 to 1948 and was referred to as Sharpshooter #1 by Sharpe. Sharpshooter #2, referred as such by Sharpe, was also manufactured by Hercules from 1907 to 1914 with a slightly different formula but the charges were the same.
Just a note: From left to right- Laflin & Rand Sharpshooter, Dupont No.1 Rifle (also a disc shape powder using the L&R Flag in Wreath logo), Hercules Sharpshooter (L&R Flag in Wreath logo). All three perforated disc shaped powders.