Ah, found it. Section 5g of the Handicap Manual has a chart. You calculate the difference in yardage based upon the tees/holes you move up or back on and it gives you a rating and slope adjustment...
http://www.usga.org/content/usga/home-page/Handicapping/handicap-manual.html#!rule-14379
And don't forget, if playing with others you need to adjust strokes as well - difference in ratings.
We played at 6700 which is fine in terms of distance even at 25 years your senior 
distance isn't a problem yet as I still average 260 when in play , even though I'm usually 40 yards plus behind you....but of course that day playing my 2nd shot from the trees alot didnt help. putting my second to 12 feet on the par 5 18th was my some redemption
at hey we both were under 90
Very interesting , never seen this before but it fits my situation well
my 5i distance is 185-190 with current Ping i20 set which places me at 6660 -6840 yards
The two courses where I play 90 percent of my golf and on both I play the 3rd set of tees from back which are 6632 and 6642 and this is perfectly comfortable for me.
thanks for sharing
My vote is for whatever gives you the most joy. Being a low to mid 80's scorer, I know for me to threaten breaking 80 regularly, playing from the whites would be my best bet, but playing from the whites for me is generally no fun as its either driver/wedge all day or less driver off the tee due to trouble in the 250+ yard areas. I love playing the tips as i get to use my entire bag and driver off the tee. Hitting driver is more enjoyable for me than potentially scoring a few strokes better playing a short course.
DC300 (and to a lesser extent me too) shares that sentiment and said as much last time we played. he could probably shoot 5+ strokes better every round by hitting a 6 or 7 iron off every tee and still hit irons into par 4's up to 420 but wheres the fun in that. I'll play the whites if other members at my course all are (6300) but can only really hit driver on 4 holes.
36 x 175 = 6300. Yes, that is about the length course I've shot my best scores. I don't mind playing anything up to 6500, but after that I'm totally inadequate. Like others, I like to use all of the clubs at least occasionally during a round and really don't enjoy teeing off on par 4 or 5 with an iron unless its a good and challenging window to try and fit that iron into. Seldom have to worry about that since my lowest iron is a 4 now. I don't score well at all on a 6500 course, but I do enjoy the try every now and then. I think making par on a 440 yard par 4 is one of the greatest feelings I get on the rare occasion that I do it.
accufitgolf I think from a distance standpoint, that formula may work, but it’s going to put a lot of “long and wrong” guys in bad spots for scoring. I’d be looking at 7200+ yards, I’m not good enough to score really well when I do actually get to pull driver every tee. I’m too wild with it. I’d have more fun at that length on a reasonably good day, but it could get ugly QUICK. I’d enjoy getting to hit more than an 8 iron in to a par 4 once in a while, but long par 3s eat me alive unless they get back to hybrid range, where I’m able to be good enough to have a shot at par. A lot of distance seems to be gained there.. not my favorite.
Heading out for some humble pie in a couple hours.
