Larry,
I don't think so.
I truly enjoy shooting LR with Specialty Handguns and I do have confidence in my abilities and intentionally promote LR shooting with SP's.
But, I also realize I am not where I want to be in the long range game.
The longer distances, 700+ get more squirrely with each 100 yards added.
I feel real comfortable with "Puff" in the 600 yard range (and a tad further).
Saying all of that I still make mistakes and miss from time to time and some days I shoot better than others.
Shooting @ paper at 600 yards, prone-no sighters, tells you what you would really do on your first shot.
I usually shoot at least a 2nd shot and sometimes a 3rd for grouping and to make sure I didn't flinch or otherwise mess up in some way.
I use the Kestrel for the wind at location and it is my primary concern, then the wind at the last third of the distance is my secondary concern with the middle wind being last.
I don't use flags,since you don't get to put them out when you hunt

I will use flags though for comps and LR PD shooting.
One way to help you know the order of your shots on paper is to have several different colored markers with you and mark your bullets ahead/in front of the ogive (shows up on your paper target). Average group size @ 600 yards this past fall was in the 3" range. Had a couple of the ranges board members around on different times watching and was invited to shoot my SP's when they do their 600 yard high-power comps.
It would be alot of fun, but I don't want to shoot a lot of comps with the 7mm Dakota, as I would like for this barrel to last for a while

I may use one of my smaller capacity cartridges though in the future.
If you want to see what your LR SP is capable of there will be a long range bench (but you can shoot prone or creedmore if you like) specialty pistol competition June 14-16 in Sundance, WY. Rich Mertz (The maker of the MOA Maximum) is putting this on.
This is the first of what is intended to be a annual event.
In addittion to the comp and prizes and prize money there will also be fun shoots and PD shooting. Distances for the competition is from 500-1,000 yards. Rich came to one of our LR specialty pistol seminars last May and has been bitten by the LR bug real bad

If I remember right, the cost of the comp is $30
As far as I know I will be able to be there, and also plan to bring my 13 year old son to compete also.