It's late to be responding to this thread but, I have an earlier .358 with the hangy down magazine and an old El Paso Weaver K3 scope. I have used Sierra 200 grain roundnose/46.5 grains of I-4064 @ 2300 fps for less than 100 yard shots at deer that groups 2".
Hornady 200 grain SP/47 grains of H-335 @ 2416 fps groups were: 1.25", 1.59" and .492".
Sierra 225 GK/48.9 grains of I-4320 @ 2463 fps groups were: .938", 1.74", and 1.373". I have taken several W/T deer with this load and none traveled more than 30 yards after the shot.
I got this gun in 1980 to shoot mostly cast bullets in and have been very pleased with this aspect. Both the RCBS 200 and a custom 225 grain will group in 2 MOA using 40.5 grains of H-4895 generating 2060 fps. I believe a better trigger would help these groups somewhat.
Shew me thy ways, O LORD: teach me thy paths.
"there are few better cartridges on Earth than the 7 x 57mm Mauser"
"the .30 Springfield is light, accurate, penetrating, and has surprising stopping power"
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