These 2 loads were fired in a totally stock Winchester Model 70 using standard bench rest technique. Chronograph was 12 feet from the muzzle. Temperature was mid 70's to low 80's. Altitude was 4,600 feet. All cases are Winchester, with primer pockets trued and flash holes debured. All were with Winchester Mag LR Primers from the same Lot #. Brass was with 2 differ en lots. Case lengths were measured with a Stoney Point Gage from the base to the ogive. Both loads cycle thru my magazine with no problems. Bullet: Speer 180 gr flat base Spitzer Powder AA 3100: 68.0 gr Comparator OAL: 3.25' MV: 2,894 fps Extreme spread 5 shots: 24.4 fps 3 shot group @ 100 yds: 0.75-1.02' Notes: A good practice load, not full load. AA3100 is not the best powder for a full intensity load but I am getting rid of it by using it for practice. Recoil is about the same as a 30-06 and full throttle 180 gr hunting load. Bullet: Barnes 180 gr flat based Triple Shock Powder: Aliant Reloder 22 72.0 gr. Comparator OAL: 3.25' MV: 3,025 fps Extreme Spread 5 shots: 16 fps 3 shot group @ 100 yds: 1.25' Notes: My elk hunting load. A large rag horn bull hit at 75 yds went about 50 yards and collapsed dead when I walked to him. That was the bullet doing that. I strongly recommend the Triple Shock if your rifle will shoot it as well as mine will.