I haven't tried AA 2495, but will put that on the list. I've been shooting a lot of ball powder lately, because I'm lazy and it meters so nice in my Harrell. 2520 mostly, with a little W748 and even BL-C(2) for plinking ammo.
Accurate Arms really blew it when the named their powder AA2495. I called them and they told me they mixed the stuff to have an identical pressure curve with IMR 4895. I suspect they were being "cute" when they named it 2495, as it was half the price of 4895. Not any more!
Because of the name, no one knows what the heck the stuff is. Funny too, the 24 pounds that I used, which was just excellent stuff, lot 21594, was made in China of all places. It gave me just outstanding consistency in the 308, 30-06 and .223. Wish I had bought a boat load.
AA2520 was "the" M1a powder for a couple of years. Because it is a ball powder people just loved the throw consistency. Hardly anyone uses it anymore, probably because of lot to lot variance. Accurate Arms buys powder from any Tom, Dick, or Harry, and each lot has to be tested to develop loads. I think that is what happened to 2520. Might also be because it leaves a lot of soot in the gas system. Almost like charcoal dust. Still it shoots great in the .223, 308, and 30-06.
I am shooting my 80's vintage AA2520 in the off season. Mostly in AR's. When I pull that bolt apart to clean, it is just covered in soot. Still shoots cleans with decent X counts at 300 yards.
I called Vihtavuori about what to use in a M1a and was referred to an "expert". After talking with him, I found out he was a competitive highpower shooter with lots of experience, so I trusted his recommendations. He did not like N-135 in the M1a. claimed it beat up the rifles. OK. He recommended N-140 instead.
If you were into shooting Highpower, in the middle nineties N-135 was the hot powder in the .223. The AMU had a "V-8" load at 600 yards, and that powder was what all the Camp Followers were using. Now, no one is using the stuff.
I tested N-140 in the 308 and .223 and decided it was a good powder. I have used it in the .223 Service rifle, and 23.5 grains with a 80 Sierra, Winchester brass, and CCI-41's is my 600 yard load. It is good enough that this year at Perry my lowest long range score was a 197. I have yet to shoot 200 at long range at Perry. Always some blasted wind or rain squall.