E.J. Hess, The Rifle Musket in Civil War Combat (Kansas: 2008), 109-10:
Range of Fire
[...Only Stones River December 31, 1862 in this post...]
88th Ilinois, Sill's brigade, Sheridan's division, McCook's Right Wing, Army of the Cumberland
Colonel ordered regiment to wait until Confederates were 75 yards away before he allowed it [unit] to open fire.
21st Wisconsin, Starkweather's brigade, Rousseau's division, Thomas's center, Army of the Cumberland
Regiment was told to wait until Confederates were within 'a good hitting distance,' and colonel ordered it to open fire at about 170 yards.
Liddel's Brigade, Cleburne's Division, Hardee's Corps, Army of Tennessee
Opened fire on a Federal brigade at 65-70 yards.
22nd Indiana, Post's brigade, Davis's division, McCook's Right Wing, Army of the Cumberland
Regiment waited until Confederates were 30 yards away before it opened fire.
35th Indiana, Price's brigade, Van Cleve's division, Crittenden's Left Wing, Army of the Cumberland
Regimental commander waited until Confederates were 30-40 paces away before ordering regiment to open fire.
6th Indiana, Baldwin's brigade, Johnson's division McCook's Right Wing, Army of the Cumberland
Regimental commander waited until Confederates were 100 yards away before he allowed his eager men to open fire.
Sources:
Quest for a Star: The Civil War Letters and Diaries of Colonel Francis T. Sherman of the 88th Illinois (Knoxville: U of TN Press, 1999), 22.
D. Gould & J. B. Kennedy, eds. Memoirs of a Dutch Mudsill: The "War Memories" of John Hentry Otto, Captain, Company D, 21st Regiment Wisconsin Volunteer Infantry (Kent State UP, 2004), 83.
Nathanial C. Hughes, ed. Liddell's Record: St. John Richardson Liddell, Briadier General, C.S.A. (Morningside Books, 1985), 112.
M. Goodings to S. M. Jones 9 Jan. 1863 OR Vol. 20, pt. I, 278.
B. F. Mullen to S. W. Price, 5 Jan. 1863 OR Vol. 20, pt. 1, 611.
H. Tripp to P.P. Baldwin, 4 Jan. 1863 OR Vol. 20, pt. 1, 339.