info on 300 mp

[buckeyeken]

I was given a pound of this to try and started to look for load info for my 357 and 44 i found some for the 357 but not for the 44 I am using 260 keiths anyone have any ideas where I can find some load info so I can start working on a load

[bigboredad]

alliant website

[buckeyeken]

been their no cast info

[Mal Paso]

Use jacket info to start. Alliant doesn't think lead can go that fast. 300 likes a full case and a long barrel. It was tested in an 8 1/4" sealed barrel and performance falls off rapidly with shorter barrels and cylinder gaps. Think slower 296.

[Iron Mike Golf]

I got a pound to try out, too. I think it's pretty good stuff.

Load:

Redhawk 7.5" barrel, 2x scope, rested, 18 yds (indoor range)
Mihec's #503 clone (255 gr Keith style SWC) sized to .433
Carnauba Red lube
RP brass
CCI #300 primers
23.0 gr MP-300

No photos of targets. I don't have a chrony. My notes say best group was .75 inches. Not shot outdoors yet.