6Dasher seems fast for load?

[Southern Custom]

So I’m developing my first 6Dasher load on a proof barrel. Using Berger 108 hybrid target bullets, over 31.5grs of VARGET with Apha brass I’m seeing around 2900fps. I’m not complaining because it’s printing 1 hole 5 shot groups around .3 MOA.
My question is, is this speed unusual? Most everything I see from this combo is around 2850. That’s what my barrel shot for the first 100 rounds before speeding up to 2900. Just curious.

 

[camocorvette]

Im loading 108eld and 106 tap in alpha with 30.5 of varget and cci 450's i average 2750 but this barrel has 1600 rounds and all my brass has at least 8 firings on it.
I do know my lot of varget is slower then my buddies lot of varget. He loads the exact same and gets 2820-2840 average.

 

[Whytry85]

Not exactly. I’m running my new barrel at 31.2 grains of Varget at 2850. May just have a fast lot of Varget and speedy barrel.

 

[spife7980]

That’s hotter than I would run.
Clean it, but I’d also ask: how’s it shoot at 2800? I bet the bolt runs easier.

 

[Roadrace33]

I have 3 dasher barrels in rotation right now, all firing 105’s and one of them shoots noticeably better at 2880-2900.

I’d try loading it lighter though like @spife7980 says. You’ll probably find a longer lasting load even if it’s a tiny bit larger group. My other two barrels are low 2800s and they are hammers.

 

[Jingoist]

I load 31.0gr under 105s out of 28" barrels and yield 2870-2880fps, so I think you are where you should be @31.5 (26-28" barrel with #450s/BR-4s?), even with the nominally heavier BT bullet.

I wish the Garmin app let us add all the custom fields for loads like the old-school Pro CX chrono and I could dig out some load data with that combo more quickly.

 

[slodsm]

It sounds right to me. Mine runs 105 bergers at 2830 over 31Gr of varget. I ran it a bit hotter during load development but I was able to to get single digit sd’s and a 10 es which I’ve repeated at every match when I run my chrono on the zero board with pretty repeatable .5 groups so I haven’t touched the load since.