Armstrong, in his history of the 25th Va., does not give the strength of the regiment going into the Wilderness fight. Regimental surgeon indicated after the action on 10 May, that the 25th went into action with 269 men. Whether this was a reference to the strength just before 5 May or just before 10 May is not clear.

With regard to casualties, Armstrong has the following regarding casualties:

5 May: 6 KIA, 2 WIA and captured, 86 captured.

6 May: 1 KIA, 4 WIA, 26 captured

10 May: 1 KIA, 1 WIA, 1 WIA and captured, 16 captured

12 May: 1 KIA, 2 WIA, 5 WIA and captured, 108 captured

15 May: 12 captured

17 May: 1 captured

18 May: 1 KIA. On this date, regimental surgeon indicated only 20 men remained in the regt.

20 May: 1 captured

26 May: Regimental surgeon indicated only 15-18 privates were present for duty

28 May: 1 captured

No casualties indicated after this date and until 25th Va began moving to Lynchburg on 16 June.

I suggest you get a copy of the book through interlibrary loan and read for yourself the discussion of casualties in the early May-June 1864 period. Armstrong addresses two controversies: the losses on 5 May and whether the losses on 12 May actually occurred on 10 May. The book will also give you the information on casualties for before and after the May-June period.