Wow, I didn't know GM3 was still available. I used to use that when reloading my 9mm Browning pistol.
As far as I can remember the bullet was 120gn and the load I used was 6gns, I think.
Not helpful for your calibre but it may give you some idea of what to expect.
Thanks for the kind words. I cast my own bullets for a number of calibres but not .357 or .44, mainly because I'm up to my armpits in GM hardcast. Do you have any mould recommendations for either calibre?
Wow thanks thats great information and more than I could ever ahve hoped for so quickly. Fantastic this definetly helps a lot and will save me time. Now to do some test laods with 158g and 180g GM heads
A word of advice should you wish to try out some jacketed bullets. The loads shown in the chart are for target shooting with lead bullets. Increase the load by a half grain at least. I've put a ring in a barrel precisely because I wasn't paying attention enough to make sure the bullet came out of the barrel. Don't go too low.