While researching more on the Sea Girt, N.J., Rifle Range, I came across "Modern rifle shooting from the American standpoint" by Dr. Walter Guy Hudson, 1903.  This is viewable by Google Search on the internet.  I obtained a printed & bound copy (arrived today) from GOOP for $12.02, shipped.  There is lots of good stuff in this reference concerning shooting the Krag in Military Matches circa 1900.  I'm attaching several images from my copy.

Wimbledon Cup Match 1902.

Front sight protector

Level - front sight

It must be lots of fun to hold on to that Krag from the Texas position with a 220 grain military load.

Dick is right.  Although not easily noticeable in the picture, the sling was utilized around the right thigh!  The text says some riflemen were still using this position, which was allowed for 800 and 1,000 yards (although most riflemen were using the prone position).  The back-position was more awkward with the Krag because of the bolt handle and sight distance.  It was popular with the .45-70 Springfield.  The toe of the Butt-plate in contact with the ground allowed Mother Earth to absorb much of the recoil.  (It was the practice of many Target Shooters to thread their sling through the rear barrel-band/middle swivel and attach it to the front "stacking" swivel).

Those old books are great fun. Who or what is GOOP? How do I order from them? Your post moved me to get out my copy of Whelen's Mr. Rifleman. I have read, reread, and re-reread the chapters on the Krag. He sure makes me want a High Wall in 30-40 like his rifle Salina. In his book is a picture of the "First Army Infantry team at Sea Girt" in 1903. Many of them attached their slings to the stacking swivel and through the upper sling swivel forming a loop. Do you know that the Army no longer teaches the use of the sling? They have not since the M16. In fact it does not have a sling but a carrying strap. Whelen's book also has 2 chapters on teaching soldiers to shoot that he wrote in 1903. We were using the same time proven techinics in the 1980's when I was a Drill SGT, with the exception of the sling of course. It is fun to read and look at pictures of guy's in suit and ties, shooting prone. Krag lovers, if you can get a copy of Whelen's book DO.

Off the subject...but, I am a Townsend Whelen fan, also. I have a rifle in 35 Whelen with his "civilian" sling. That set-up is surprisingly stable. I've also put a 1907 sling on my sporterized Krag. One interesting note he put in his "Rifleman" book is that he doubted that Marlin, who stopped production of leverguns in WWI to make other things, would start-up its production of leverguns again. The design was just too obsolete. Fortunately, he was wrong.