Loading Question - MH 577/450

[Tackleberry41]

Solo 1000 is an older Scot powder, but now made under the accurate name. The reloading place had a big 8lbs keg still under the scots label for a really good price.

Burn rate its right next to Green dot on the chart. Charge wight wise in 9mm or 45 auto its really close to Unique. So maybe low end unique charge wt and go from there?

[Southernfi]

I got to where I don't trust Trail Boss in a large case like the Martini. It doesn't have any effeciency in a case that large. With IMR 4198, I also encountered position sensetivity issues. SR4759 provided enough volume to utilize the case volume more effeciently and is not position sensitive.

[zuke]

Solo 1000 is an older Scot powder, but now made under the accurate name. The reloading place had a big 8lbs keg still under the scots label for a really good price.

Burn rate its right next to Green dot on the chart. Charge wight wise in 9mm or 45 auto its really close to Unique. So maybe low end unique charge wt and go from there?

That's where I'd start.

[fouronesix]

Solo 1000 looks kind of fast to me.
http://www.accuratepowder.com/wp-con...burn_rates.pdf

[Tackleberry41]

They have red dot loads, solo 1000 is just a notch below that on the chart

[fouronesix]

No load recommendations from me on this one! Here's another burn rate chart as was the request by zuke.
http://www.lapua.com/upload/reloadin...echart2011.pdf

[stephenj]

I noticed that awhile back someone asked about fillers with the unique loads .

I do not use any fillers .. i also do not position the powder charge .
I do not position the powder because 11-12 grains of unique is just a tiny spot of powder in this huge case .
And with my reformed shot shot shell cases being a semi balloon head design a fair portion of the powder charge is actualy behind the flash hole if you position the powder at the back of the case