300MP MSDS ... (You need to Login or Register to view media files and links)
H-110 MSDS ... (You need to Login or Register to view media files and links)

* 300MP, per Alliant, is a 'little bit' slower than H-110's Burn Rate
* Both powders are stated to be pistol powder but now H-100, introduced in 1962, is sold as a rifle-pistol-shotgun powder
* Both powders are double based powders
* Both powders are extremely fine grained flattened spheres.  Some grains the size of dust!
* Both powders are silvery gray in color (the silver has to be the flakes of tin dioxide)
* Both powders possess high grain density, meaning they occupy very little space per unit of measure

Reading up on Hodgdon H-110 in Propellant Profiles, here are some interesting items that may make 300MP a better powder for use in the light Schuetzen rifle bullet weight calibers:
** Hodgdon recommends that magnum primers be used for consistent ignition of H-110
** Hodgdon also recommends to use a heavy crimp to aid ignition
** My recommendation due to the high grain density, to preclude grains embedded in the primers through the flash hole and aid ignition is ... use an over the flash hole wad.  A light paper is my choice so as not to decrease the brisance

Hodgdon does not recommend that H-110 be downloaded and Alliant has no answer or data for downloaded charges.  So, plan to determine if this is fact or fiction this weekend for a test using 300MP. Have 20 rounds loaded with the BACO 8.15x46R, 174gr stop ring bullet.  Five each rounds: 9g - 10gr -11gr and 12gr.  Will chronograph them if Mother Nature allows!

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Quote:

John, already done when you 1st made the posts.  When the weather breaks, plan to use your data for my CPA 32-40 and 38-55 HiWall.  Also will give the 300MP a ride with some Ideal Hudson's in 32-40 and 38-55

First test of Alliant 300MP for Gallery downloads.  Shot at 25yd in the Aydt Type II with 6 o'clock hold from rest.  Sights: blade foresight and diopter rear.
Target pictures to follow when I return home so I can scan them. 
Best Target - 12 grains      

8.15x46R Loading Data                  
30-30 Reformed Cases                  
Federal 215 LR Magnum Primer No Flash Hole Wad
Alliant 300MP Powder                  
Baco 0.316 Stop Ring 180gr (174gr 1:20)                  
                       
          9 Gr     10 Gr      11 Gr      12 Gr 
          938.4      1040      1120      1224
             971      1071      1131      1230
          978.6      1059      1127      1233
          935.8      1084      1111      1170
          969.2      1113      1075      1216
AVG      958.6    1073.4   1112.8   1214.6
Median  969.2      1071      1120      1224
SD        19.96     27.42       22.45    25.76

Notes:
1.   Not happy with the STD DEV.  Possibly a wad over flash hole will decrease the SD spread
2.   12 grain load and resulting target looks to be a good 200 yd reload

Quote:
John, no.  Test #2: std LR - LP - and CCI BR2 with a thin wad over the flash hole.