I can't help much - most of my ammo is 3-4-5 yrs old.Rich- Being that I don't have a chrony and I assume you do, how close are advertised speeds with the currently manufactured power shok loads? I'm thinking the test barrels are 24" for standard long action catridges? I.e. 30-06, 270, 280. My rem 700 280 w/22 in barrel really likes the 150 gr powershoks it seems. I'm thinking i'm losing maybe 70 fps. Just curious. Wouldn't matter for the shooting/hunting I'm doing. FWIW its a 9 1/4 twist factory Rem barrel made about 1987 or 89
The Power Shok 243 load shoots about the same as a 2,950 fps Nosler partition load at 100 and 225 yards. It doesn't "seem" to be any slower based on my memory of where the bullets impact on paper. I can't remember chrono-ing them.
We gotta remember that diff model rifles will shoot differently. Some might have higher pressure and faster velocities while others have lower. Consistency seems to be king, IMO. If we know where the bullet is gonna hit and can make our shot count, that's what we're trying to do....
Wish I had more for you.