I am looking for load data for my .505 hoping to use H extreme powders. Seems like many use Reloader powders. Any help out there?

DCC

My 505 Gibbs was made Ryan Breeding. Here is his data sent to me.

"I am glad to hear you are having fun with your new rifle.I was very happy with the way it turned out. The load I used: 135 grains of H4831 is 2400 fps. I have used as much as 144 grains with a 600 grain woodleigh, but this is too heavy on recoil. It is a safe load at 2450 to 2500 fps. I have also used 128 grains of H4831 with 525 woodleigh at about 2200 fps. I am guessing your load will be short of 2100 fps. Let me know what you find out. Thanks for the update.

Best wishes,
Ryan"

My practice load to which Ryan refers is 122.0 grains of H-4831. It is lower recoil than a 458 Winchester Mag with more smack.
Good luck

VC,
The loads you list seem very hot. How many times can you reload your cases at those levels? 600gr at 2500fps - ouch!