Accurate Arms AA2495 is a copy of IMR 4895. I called Accurate Arms about AA2495, they said it duplicates the IMR pressure curve. Stupidly they call it AA2495 instead of AA4895, which confuses everyone. Charge for velocity, I was unable to see any meaning difference over the chronograph.
I used 47.0 grains with a 168, 47.5 grains with a 150 SMK.
AA2520 is a ball powder. This powder is entirely appropriate for use in the M1 Garand and M1a, Accurate Arms claims port pressues are proper and that they developed it so it would give the same pressures, grain for grain, as IMR 4895. I have used it for twenty years and it works fine. Just dirtier. My chronograph data, grain for grain, (within lot variations) leads me to conclude that it is a ball powder equivalent to IMR 4895.
I have used 47.0 grains with a 168. The lot I purchased from Pat's reloading ("PAT's 2520") was about one grain slower than some of my other lots.
I seldom shoot anything but match bullets.
Code:
[SIZE="4"]M1 Garand 5 925 YYY
Rack grade rifle, GI barrel.
150 gr Sierra Match HPBT 47.5 IMR 4895 CCI#34 WWII cases OAL 3.30"
24 Mar 04 T= 70 ° F
Ave Vel = 2630
Std Dev = 33
ES = 109
Low = 2580
High = 2689
N = 16
150 Sierra Match 48.0 PAT2520 Lot 6095 WCC54 CCI#34
29 April 04 T= 80 ° F
Ave Vel = 2625
Std Dev = 40
ES = 127 "
Low = 2547
High = 2674
N =8[/SIZE]
This is a 19 shot group at 100 yards, Rack grade Garands are not tack drivers.
