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
Printable View
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
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.
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.
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.
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.
Be cautious with Superformance, if following "classic" load reading.Quote:
Originally Posted by Xringer1
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