I didnt measure how far off....but in one rifle they have a 'jump' of about 3mm...almost kissing in the other. When I seated them out to avoid the jump they didnt feed worth a krap, so I seated them all at 55.7mm and both rifles digested them just fine.
FWIW the one thats kissing is a pretty normal chamber, the other one is obviously long....

I dont get too wrapped up about the seating in an AI without mag mods...you seat them so they fit in the magazine, and hope for the best wink


"...the left considers you vermin, and they'll kill you given the chance..." Bristoe