25 creedmoor load data????

[Xringer1]

What load date and powders are the 25 Creedmoor guys using?
I’m starting with H4350, SW4350, Superformance, and H4831.
When it comes available I would like to try RL26. Thanks

[98dyna]

I would wait on Superperformance until last to experiment with. I have been using it in 6.5 Creed and .260 Rem AI test loads with fair luck. I would try H4831sc, starting at 40 grains with a 120 grain bullet. What I would like to see is a 25 Remington (.260 necked down) AI, that would work better in a AR10 than the 25 WSSM did in an AR15 with the same ballistics.

[Burr]

fwiw, I believe the case capacity of the 25CM is close to the 250 Ackley improved. I found Hybrid 100V to do well in my 250 Ackley.

[Xringer1]

Did some we break in yesterday with SW4350 and 117 Sierra GK. The first 5 shots were shoot and clean the barrel plus move the scope. Then I was close and decided to go for a 5 shot group. Well I was amazed how great this thing shot for a breakin round. 5 shot hole can easily be covered by a dime.
42 gr SW4350 - 2707 FPS average out of a 25” Xcaliber 7 twist.

Not exactly the speed I was after but the barrel should speed up a little as it gets broken in.

[1vakid]

I got my best groups with 4350 but, not the speed I was looking for. I ended up using RE 26 and the, "magic" happened. Speed went way up and my best groups were still under .500 with the 131 gr. Blackjack bullet.

[darkker]

What load date and powders are the 25 Creedmoor guys using?
I’m starting with H4350, SW4350, Superformance, and H4831.
When it comes available I would like to try RL26. Thanks

Be cautious with Superformance, if following "classic" load reading.
I don't know if it flows into other applications (these things rarely work the way you wished they do), but in the Creedmoor; Superformance is a VERY progressive powder. The simple version is that means you can't load it and watch speed linearly like a "classic" powder, and know what rough pressures you are running.

The more technical version:
A progressive burning powder will change it's burning speed with pressure. So a "classic" powder will spike in pressure, then drop rapidly; think of a heart beat on a cardiogram. A progressive powder will ramp up, and increase burning speed, effectively drawing a plateau or a Mesa in the pressure curve.
So you have more of a sustained push on things.
I've done a bunch of pressure work with it in the Creedmoor, really easy to dump 15-20,000psi but only lose 50-75fps.

Cheers