Per request on an individual on another forum, here are the test results from this morning's shooting. Ammo was LC-13 M80 and Pre GMM 168 gn Sierra Boat tail HP.
Rifle Rock-Ola M21 DMR #40 built with TRW bolt, Winchester op rod, SA trigger group, Bula med weight NM barrel with LRB muzzle brake sitting in a usgi fiberglass stock. Scope is a Leupold MK-4 3.5 - 10. Cheek riser is bolt through adjustable Kydex. 20 rnds of each ammo was fired with 10 minute cool down between 10 shots fired.
This quite effectively shows a significant difference between quality and standard ammo. 100-6X with the good stuff and 97-1x with M80. Whatta Hobby!



Rock-Ola #40 1.jpgRock-Ola #40 2.jpgAmmoo test 1.jpgAmmo test 2.jpg