Anything interesting of note working with that GP11 brass? What method did you use to remove the berdan primers and what dies are you using?
I use RCBS dies and so far they work very well. My groups were cut in half or better with my hand loads vs the already excellent GP11. And these were almost the first rounds I ever reloaded. I think I did 20x 8mm mauser first, but that's it.
as for the GP11 brass, I deprime using a tool I made. I had a piece of quality tool steel round wire(It was a spring of some sort). its about 1/16th or so in diameter, maybe a bit thicker. I made a pointy end, sort of "spoon" shaped. did this with a simple grinder. this I tap into the primer just to one side of the case anvil and then pry the primer out. Works well. To hold the brass, I remove the sizing part of the die and install the die upside down in my press, then place the brass in the die. A bit of case lube and work with the depth of the die in the press to be able to always pop the case out. I use a small 6" prybar under the extractor groove to pry them out if they get stuck. Have not ruined one case.
as for primer pockets, I de crimp and clean the pockets well, and ensure that the two small flash holes are open. I use little picks and dental tools, and brushes. I often re tumble after I have done all that, and trimming/deburring. Sometimes you have to remove bits from the flash holes again, but its nice.
Oh and note that there are two different Tula 7.62 primers. You need the large ones, for x54r not x39. They are the same price as regular large rifle primers and work just great.
second note on primers, they WILL fit deeply into the primer pocket, not flush with the head of the case. This caused me a fair amount of concern, but I did some research and its fine. as well, they shoot just great.
you only have to de crimp on the first firing, not after, and the primers come out much easier after they have been de crimped.
I want to start annealing so I can make the brass last longer, but I have lots of GP11 and a few hundred rounds of boxer primed as well, so its not a huge priority.
For projectiles I like to use near GP11 size pills. 168-178grn with my best groups so far from 174grn Berger long range fmj. I have been toying with using some bulk 150grn bullets as they are quite a bit cheaper, but I suspect accuracy will suffer.
My rifle likes light powder charges, and this has been fairly well documented on the Swiss rifle forums, but you will have to see what yours likes. Its nice cause its cheaper to shoot, and has noticeably less recoil than GP11. I have had great success with IMR 4064, H 4895 and 4350. I am sure many other powders will work well. Its close to .308 and a few other projectiles in case capacity and pressure, as well as other dimensions.