I don't have any AI chambered rifles but from my understanding you need to either fire form or use hydraulic dies to form the brass before you can use standard FL sizing dies.
HuntOregon, I knew I had seen that before. you are right it is not a lube issue. this is a forming process problem.
Do you have some old 30-06 brass to form 6.5-06 AI? if you push any 23 Degree shoulder case through an AI die it will make those ripples and they most likely will not come out without many firings. if have any 30-06 or 270 Win; you will find that this issue transcends lube. this is trying to setting a shoulder and reforming the brass at the same time.
what you experiencing is 3 issues combined.
the necks are stretching making excess brass on the shoulder (making it ripple badly), you most likely did not anneal the brass before this reforming, you are AI sizing a convential brass. you are asking the brass to do too much in one process.
#1 is you are using 25-06 brass. use 30-06 or 270 win brass and start with a 6.5-06 23 degree shoulder die then fire form into 6.5-06AI
#2 try going from 30-06 to 270 win, to 6.5-06 then fire form them to 6.5-06 AI.
Been loading 6.5-06 AI for years. May I suggest:
25-06 brass is ok but don't FL resize. Just use expander ball in resizing die to neck up to 6.5 then neck up using expander ball again to 7mm. You now have a fat neck.
(The reason to not go from 25-06 to a 7mm neck is you will ruin some cases by doing so. Therefore go to 6.5 then 7mm. Or you can use 270 Winchester cases but they will need to be trimmed. Or if you neck down 30-06 cases you may need to ream the inside or turn the outside of the final necks)
So after you have that oversized / over caliber neck, go back to 6.5-06 die and carefully adjust the die down to resize the neck to create a false shoulder. Adjust die down repeatedly trying to close the bolt on the case until you can get the bolt to close on the case in the rifle. That is called a crush fit.
Seems like a lot is *** pain, but if you do several hundred cases at a time it is repeatable and fast.
So you now have a case that is head spaced in that rifle and you can fire form with either a normal 6.5-06 load or cream of wheat.
If you want to avoid barrel wear use COW
Do that by:
Priming the case
Add 14 grains of Unique powder
Top off with COW to the shoulder/neck junction
Put in a wad of toilet paper or cotton to hold everything in place
Then chamber and fire the round
You will have perfectly fire formed cases with no additional barrel wear