Looked up data and the closest I have is:
From a 6" S&W:
21.5/296/200 Speer/1243 (296 and H110 are the same powder)
23.0/H110/210 Hornady/1350
23.0/H110/210 Hor. Sil./1375
Federal 210/1350
Remington 210 SP/1310
All these rounds were chroned on the same day...
Add 10 grains of bullet weight to Load #1 and subtract 2" of barrel and you are in the 1100s...
When I use H110 there is no air space left in the cartridge. Your loads show a 84 fps spread...mine are usually 20 or under.
I rarely use H110/296 in 4" barrels...just too much wasted powder burned past the end of the barrel...that is the muzzleblast you are getting...
Just found an old entry from 1984...4" M57/210 Hornady/23 grains/H110/1250 fps. I show the exact same velocity from the same gun and bullet with 13 grains of SR4756 which is much faster burning and much less muzzleblast.
Bob
