AHH I WOULD NOT TRUST WIKIPEDIA. SOME OF THOSE PRESSURES YOUR POSTING ARE NOT CUP PRESSURES THERE PSI! I WAS LOOKING AT SOME CARTRIDGE SPECS THE OTHER DAY AND THEY WERE COMPLETLY WRONG
IF YOU HAD A .308 WIN MAKING 62,000 CUP AS STATED THAT WOULD BE AROUND 70,000 psi NOT GOOD. ROUNDS RATED IN CUP ARE ALMOST ALWAYS A LOWER NUMBER THAN WHEN RATED IN PSI.
AS FAR A A 30-06 IN A AK iM NOT SURE ITS WORTH IT UNLESS YOU HAVE A TON OF AMMO FOR IT. THE 308 WILL DO ALMOST THE SAME AND A TON LESS WORK AND EXPENSE. DONT GET ME WRONG WHEN i HUNT WITH A BOLT GUN ITS A 06 MOST OF THE TIME. iF YOU WANT TO LENGTHEN A BOLT TAKE A 5.45 SMALL STEM BOLT AND ADD AA SLEAVE THAT IS LONGER AND MAKE IT A SPRINGLOADED PIN WHILE YOUR AT IT. I HAVENT DONE IT YET BUT THERE IS NO REASON IT WONT WORK.
IM NOT SURE i FOLLOW YOU BUT IF YOUR SAYING ADDING A SECTION OF BOLT FACE TO ANOTHER BOLT THATS A BAD IDEA ESPECIALY IF YOU ARE GOING TO BRAZE IT OR ANY THING THATSS GOING TO AFFECT TEMPER NOT TO MENTION THAT BOLT TAKES A BEATING. NOTING LIKE BRASS OR SOLDER IS GOING TO WORK EVEN IF ITS UNDER COMPRESION.The snag is "first you get a .308 Saiga bolt". Since they're basically unobtainium, the simplest solution is to adapt a standard bolt. The main difference is the Saiga bolt is longer from the locking lugs to the bolt face. This could be easily handled by cutting off a spare bolt, turning it to spigot into the original bolt. Braze or silver solder as needed. By cutting an extra bolt you would avoid having to make all the cuts for the extractor. You'd need a longer firing pin; cut and weld, or perhaps a PSL pin.
READ THE CHAMBER PRESSURE THREADS THERE ARE SAMMI SPECS IN THERE IN THE LINKS.