Quote:
Originally Posted by metalman60
Thank you everyone. What I did, is measure the 158 gr swc bullet and subtracted the length from a new .357 case. I then machined the case down to this measurement. I filled the shortened case to the max with Trail Boss and measured the charge.
I just finished shooting a 4.5 grain load of Trail Boss in .357. Recoil was mild, brass ejected without any sticking, there was no visible evidence of flattening on the primers- The weapon is used was an old Ruger security six, with a 6 inch barrel. There was no barrel leading or lead build up in the forcing cone.
Thank you again for all your comments.
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It sounds like you forgot to take into consideration the case head and web thickness when you subtracted the length of your SWC bullet from a new .357 case. That would explain your finding a max of 5.1 grains.
I agree with Rule3 about your choice of a starting load. You won't always be lucky. FWIW, visual examination of primers and cases tell you nothing about cartridge pressure except that it was not high enough to blow up your gun.