Tried 2 different powders today with the 225gr Accubond mainly just to see if I could get them up to a decent usable velocity in my 20-21” barrel. At 2400-2450 the energy is roughly equal to a 185gr at 2700 and you give up a bit in the trajectory department but inside 300 yards it’s minimal.

Loaded in new necked up Lapua brass with Fed GM210 primers @2.890” OAL which is about 15 thou jump in my rifle. Temp was between 65-70 degrees.

I loaded RL15 from 42.0gr - 45.5gr…Nosler data was 45.0 max with QL showing a bit higher.

RL15 - 44.5gr - 2314, 2314, 2306
RL15 - 45.0gr - 2346, 2330, 2340
RL15 - 45.5gr - 2346, 2354, 2350

Accuracy was best at 44.5gr and I had no signs of pressure at any load weight.

I loaded X-Terminator from 40.5gr - 43.9gr. Barnes had 43.5gr listed as max for 210TSX and Hodgdon had 43.1gr as max for 225 AB.

X-Term - 43.1gr - 2389, 2398, 2392
X-Term - 43.5gr - 2403, 2400, 2389
X-Term - 43.9gr - 2417, 2410, 2412 (stiff bolt lift)

I would call 43.5gr as max in my rifle and unfortunately accuracy was best at 43.9gr. Velocity gain really started to flatten out over 43.1gr.

My guess is the RL15 was a little too slow in the shorter barrel length and X-Terminator being a bit faster gave me close to 100% burn in my barrel. H335 and Benchmark might be next powders I try if I test any further. Accuracy with the 225 Accubond wasn’t what I would say was representative of what the rifle is capable of so my barrel may not like them, may not like the powder, or they may need some more jump.

Overall, a 225AB at 2400 is achievable but going to drop back to the 185gr and see if I can improve accuracy.