Bringing an old thread back up. Today I shot some loads taken from Seafire's data. I used SR 4759 and 100 grain Sierra HP's.
I used his recommendation of 20 grains to 25 grains. All loads were very mild in my grandsons Ruger M77 Compact.
The report was sharp out of that short 16.5 inch barrel though. Velocities over my Magnatech Chrony were as follows.
20 Grains = 2023 fps
21 Grains = 2094 fps
22 Grains = 2175 fps
23 Grains = 2243 fps
24 Grains = 2312 fps
25 Grains = 2373 fps
None of the loads showed signs of over pressure in my Nosler brass.
I plan to load up 5 with the 25 grain load and see what kind of group I get at 100 yards,
