My 1885 Winchester (Miroku) single shot can shoot one hole groups at 50 yards using Wolf MT ammo and CCI SV is nearly as accurate. Also, I enjoy the quietness of SV ammo.
In addition to less wind drift, most SV target ammo is just plain higher quality than your typical bulk ammo. At 25 yards, most HV ammo is still supersonic and accuracy mostly reflects the quality of the ammo.
For hunting, the flatter trajectory of high quality HV ammo probably means more than the slightly lower wind drift of SV ammo, because your target isn't always EXACTLY fifty yards away.