I just bought a SPS tactical. It has a 20inch barrel with a 1/12 twist. Now I have heard that this twist doesn't like the 175SMK. All I really plan to do with this rifle is practice my shooting. A good friend recommended that I shoot the 155 scenars and the 155 amaxes out of it. Will I still be able to reach a grand with these? Anyone have any pet loads out there that use these? Any info is appreciated.