CAUTION: The following post includes loading data beyond currently published maximums for this cartridge. USE AT YOUR OWN RISK. Neither the writer, The High Road, nor the staff of THR assume any liability for any damage or injury resulting from use of this information.
More data.... I bought some 340 gr bullets (LBT-LWFNGC) from Rim Rock bullets. As before this is out of my Ruger Super Red Hawk Alaskan, 2.5" barrel.
1.772 OAL
21gr H110
Average: 1143 fps
Standard deviation: 16.5 fps
21.5 gr H110
Average: 1185 fps
Standard deviation: 16.3 fps
I shot 12 rounds of the 21.5 gr load and my hand barely held up. This is one stout load. Although I did not see as much case expansion, judged by how tight the cartridges were in the cylinder after firing, as I did with the 22gr load with 320 gr bullets. Primers looked good too. If I get up the nerve I may try a few of the rounds with 22gr of H110.
Thanks to CraigC for the link to this load data.