Quote from: Ridgerunner665 on February 05 2017 08:36:02 AM MST
Success....

12.5 grains of #9 gave 1,210 fps with absolutely no signs of pressure at all.... None.

Even the normal "Glock bulge" is less with #9.

I'm gonna try 13 grains later today just because Hornady says I can, and the brass appears to agree.

200gr bullet? Nice!

I'm always seeking those slower powders.

Yes...200 XTP.

You'll need a modified seating stem, otherwise you'll crush the bullet nose on the XTP.

The loads are getting a little compressed at 12.5 - 13 grains.

http://10mm-firearms.com/index.php?topic=5816.0

What's not to like about #9?

Meters like fine grained sand (literally).

Cleanest burning powder I've ever used.... And I've used a lot of them over the years... The brass is still shiny inside after using #9 ... The hotter you run it the cleaner it burns (common for most powders).

I don't think you could get enough of it in the case to get yourself in serious trouble.

And no worries about bullet setback.. . The bullet is sitting on the powder.

Quote from: Ridgerunner665 on February 05 2017 08:48:46 AM MST
What's not to like about #9?

Meters like fine grained sand (literally).

Cleanest burning powder I've ever used.... And I've used a lot of them over the years... The brass is still shiny inside after using #9 ... The hotter you run it the cleaner it burns (common for most powders).

I don't think you could get enough of it in the case to get yourself in serious trouble.

And no worries about bullet setback.. . The bullet is sitting on the powder.

Are you talking to me? I've got nothing against #9. I just don't load (or have not yet run) 200gr bullets. Last year or 2015 I spotted it on the burn rate chart, and in my books. On paper it looks great, but not many people use it (maybe the reason for your comment). I used to use a lot of #7, it's fine for plinking - but not for hot loads, IMHO.

I wasn't talking directly to anybody... Just making an observation.

13 grains of #9 just barely, and I mean BARELY, left a smile on the brass... Not one you can feel, but you can see where the chamber left a mark....1,256 fps.

I want to leave a little room for variables.... So I'm gonna concentrate the rest of my load work between 12.5 and 12.7 grains of Accurate #9.

This is great to hear. I have a full pound of No. 9 that I have never even opened -- and a new Model 40 ...

I have settled on 12.6 grains of Accurate #9 for 1,216 fps (10 round average)...ES 11, SD 4.

Thats a good stout load that isn't so pressurized as to be worrisome...650+ ft. lbs. of energy and plenty of penetration with the XTP.

How is the accuracy with the 12.6 grain load? If it's accurate that would be a tough load to beat with the 200 grain XTP. 

Quote from: sep on February 05 2017 02:09:11 PM MST
How is the accuracy with the 12.6 grain load? If it's accurate that would be a tough load to beat with the 200 grain XTP.

From as solid of rest as I can muster (rear bag rifle rest across the seat of my 4 wheeler, pretty solid) I'm getting 3-4" at 50 yards.

The gun/ammo could surely do better...I am the limiting factor 

Quote from: Ridgerunner665 on February 05 2017 12:47:03 PM MST
I have settled on 12.6 grains of Accurate #9 for 1,216 fps (10 round average)...ES 11, SD 4.

Thats a good stout load that isn't so pressurized as to be worrisome...650+ ft. lbs. of energy and plenty of penetration with the XTP.

Can you help a 10mm bro' out?  I'm well-stocked with many canisters of AA #7 - arguably, I'm overstocked. 

Can you  - or anyone else  -  recommend a "hot-ish" AA#7 load with the same 200gn bullet, ...

... and if you know, a stout AA#7 load with a 220gn hard cast bullet?

It would be appreciated. Thanks! 

Here is the Accurate Arm data I have from early years...This should help out. 

I haven't used AA7 so I don't have anything to offer.

AA#7 just isn't going to get you there safely with bullets over 180 grains.  200 grain and heavier bullets need a slower powder.

Grab some 165-180 grain bullets and #7 will be great.  Or grab some #9 for your heavies.

Fun facts...

4 inch 44 mag, 240 grain JHP bullets, standard loads...........................................1,165 fps, 723 ft. lbs.
4 inch 44 mag, 310 grain Garrett Defender, premium ammo...................................1,020 fps, 716 ft. lbs.

6 inch 10mm, 200 grain JHP bullets, full power 10mm load...................................1,280 fps, 726 ft. lbs.


I know they make much heavier loads for the 44...but the guns that can use them get pretty big and heavy...the above is just a comparison of similarly sized handguns.

A long slide 10mm and a 4" 44 mag are very similar in length at around 9.5" or so....and it would appear they are very similar in power as well.

Something to be said for a handy 15 rounds, vs 6.