Today I got to shoot my double from the shoulder for the first time, and the sound and kick was there thats for sure.

On 25meters she crossed 15cm so i turned my homemade regulating bushings to use half of their capacity (0,3mm) and now they "only cross 12cm.
So my concern that shotgun barrels are to crossed seems right, but the barrels are floating so this could be a factor.
Now i have heated the front of the barrels and spread them 1mm, messuring with a couple of boresighters the barrels now cross about 6cm in 20m (before 18cm). Tomorrow i will give it a try ones more to see if they are about right, and if i will test it in a 100m range.

Thanks, with my mistakes and all i think 150-200 hours. But now when the barrels are moved the blue is ruined, so it would have been faster and better if i made a monoblock.

But hey, i made it to learn and i did so i cant complain.