I made a test brass from Lapua Palma to my 260rem.
Small primer pocket can take more pressure.
I had Vihtavuori manual max load for 123gr Scenar, it give a good accuracy with that, N150 max is 38,6gr..
https://www.vihtavuori.com/reloading-data/rifle-reloading/?cartridge=13
I did try that out of the Palma, no good at all.
But i did add powder by 0,8gr and it gives one hole, added another 0,8gr and super accurate load.
Though my friend told me, that you need to be careful with the Palma, because there are no same kind of pressure marking that large prime pocket and primer gives.
But bolt opened smooth and what i see, primer was not flattened to the primer pocket.
I should take my Magnetospeed to the range next time to see, what kind of speed this 1,8gr adding to the powder gives.
With 38,6gr powder it give the short 20" barrel to 123gr Scenar speed at 2680 fps.
Have you guys tested Palma cases in to your Tikka rifles, specially Tikka 260rem owners?
That black dot it 16mm.