Accurate 1680

[Pinetreebbs]

If you want some fine powder, try some True Blue. Seriously they are both excellent powders, with one warning if you have a Chargemaster powder dispenser find an larger pan to prevent spilling dispensed powder. During the fast fill phase it would sling some powder past the standard powder pan. I use half of an old tin typewriter ribbon box. Electrical tape used to come is a similar tin.

 

[Catfur]

AA 1680 is practically the same as the "discontinued" Winchesster 680. So, if you have old manuals, you can use that data.
Just don't think they are ideal for low-pressure cartridges

Pretty sure I read somewhere it is WW680 (maybe Handloader?), as packaged by Accurate Arms.

 

[TC260]

Pretty sure I read somewhere it is WW680 (maybe Handloader?), as packaged by Accurate Arms.

Could be wrong but I don't believe they're the same. Very similar yes. I haven't loaded with either for a few years but I think in a 357 Max anyway the data was different and 680 yielded a bit higher velocities. I'm on the road and can look at the two side by side when I get home in a few days but as I recall they physically look a little different too. Although all commentary on the issue is subject to a hazy memory