Police Snipers..
While I can not add any info on Military Snipers, I do have some info on police snipers.
Years ago, I was tight with a Class III gun dealer that had a local LEO as his partner in the gun shop.
This Officer was also on the SWAT team of a large city (750,000) PD. He also happened to be one of the several snipers that were on the team.
I got the chance to see his Duty Rifle, a Ruger MKII HB that was glass bedded, and all tricked out...BEAUTIFUL weapon, in .308 Win. Now this was YEARS ago-it was in WOOD.
When this Ruger was brand new (before the PD even got it) it was sent to Hornady Mfg. in Grand Island, NE. to have the chamber completely miked, measured+checked out. Hornady loaded the specs for THAT rifle into their data base for future loading supplies.
To order ammo for THAT rifle, they just contact Hornady, and tell them to send ammo for *PD #3. Hornady will assemble the ammo that is tailor fitted for THAT gun.
I also saw some of his practice targets-Bad Guy with a hostage in front of him.
In the first target the "Bad Guy' had FIVE holes in the center of his forehead that a Quarter would cover.
On the second target (shot within 2 minutes of a full gear 5 mile run), those groups opened up--A half dollar coin would cover up!!
So, from what I have seen, YES LEO Snipers DO use special loads for THEIR rifles...Bill.