Powders for loading 200gr cast 10mm

[4given]

My new XDM 10 is on it's way so it is time to work up some test loads!

I ordered some 200gr WFN Hi-tek coated cast boolits from Montana Bullet works and would like to work up to a 1200 - 1250 FPS load. I would like to start out with powders I already have on hand. Powders I have that I think might fit the bill are Longshot, Power Pistol and 2400.

Looking at the available load data it looks like Longshot might be the ticket. The only Longshot load data I can find is on the Hodgdon site for 200gr XTP's. Nothing for cast. I figure I will use this data to get a starting point.

Any other load data out there for the 200gr cast? Any other input?

Thanks!

[Outpost75]

Of the powders you list, Power Pistol is the only one listed by Lyman.

From Lyman Cast Bullet Handbook, 4th Edition (2010) p. 265

RCBS 10mm-200SWC 1.250" OAL

TiteGroup Start 4.8 grains 1057 fps/24,700cup MAX 5.4 grains 1148 fps/28,300cup
Bullseye Start 5.8 grains 1093 fps/24,300cup MAX 6.5 grains 1180 fps/29,100cup
Unique Start 5.7 grains 1060 fps/24,600cup MAX 6.4 grains 1161 fps/28,800cup
WSF Start 6.2 grains 1082fps/23,800cup MAX 6.9 grains 1172 fps/29,100cup
Power Pistol Start 6.8 grains/1110fps/22,100cup MAX 7.6 grains 1198 fps/28,900cup

[dragon813gt]

You can use jacketed data for cast. You should be starting low and working up anyway. Of those powders you’d want Longshot. That and 800-X are the top performers in 10mm. The later meters like gravel but is my preferred powder. I’m positive there’s a good bit of data for 200 grain bullets in Lee’s manual.

[4given]

Thanks for the Data Outpost75! Interesting, similar velocities with all powders listed. I have Bullseye and Unique on hand but would have thought them too fast to crowd the 1200fps mark. Go figure.... :)

[4given]

You can use jacketed data for cast. You should be starting low and working up anyway. Of those powders you’d want Longshot. That and 800-X are the top performers in 10mm. The later meters like gravel but is my preferred powder. I’m positive there’s a good bit of data for 200 grain bullets in Lee’s manual.

That's what I was figuring on doing. I don't have any 800-X so I guess I'll try the Longshot.

[Stuckcase]

Find 800x. You wont regret it if you are loading one at a time (non-progressive). Its the cats behind in 10

[RJM52]

Hopefully by now you have found a great load...

I'm also shooting the Montana 200 but just the plain lead.

8.6 gr. of Longshot gets 1210 from a RIA 4.25" and 1260 from a PARA Longslide Hunter.