Quick 300 WM Load with H4831SC and 210 VLD

[Tiny Tim]

Don't have access to other popular propellants for this caliber. Due to work schedule and moving, I have little time for load development prior to deer season. Gun is recent acquisition and will be used as a backup. Shots likely 300 or less. Savage 110 in Boyd's laminated thumbhole stock. 300 WM with 24" 1:10 barrel. Using H4831SC and loaded .060" off the lands to fit mag box, I had the following:

66.5 gr. 2561 fps
67.5 2635
68.5 2679
69.5 2701
70.5 2748 (Berger book max)
71.5 2788 (Book max 2777 in
72.5 2828. 26" barrel)
73.5 2882
74.5 2916

Primer started to flatten slightly @72.5 and bolt lift SLIGHTLY stiff @ 74.5. Primers never any different than @72.5 and never an ejector swipe.
67.5 to 69.5 formed a .44" group with only a 22fps increase from 68.5 to 69.5. Would you focus on loading in this latter range. Never done such a coarse load development. Seems abit slow and I know it's not the best powder, but it's what I have to work with for now. Any advice would be greatly appreciated!

 

[wsq]

The classic hunters seemed to work much better for me in a rifle that magbox wouldn't let me get closer to lands

Don't have access to other popular propellants for this caliber. Due to work schedule and moving, I have little time for load development prior to deer season. Gun is recent acquisition and will be used as a backup. Shots likely 300 or less. Savage 110 in Boyd's laminated thumbhole stock. 300 WM with 24" 1:10 barrel. Using H4831SC and loaded .060" off the lands to fit mag box, I had the following:

66.5 gr. 2561 fps
67.5 2635
68.5 2679
69.5 2701
70.5 2748 (Berger book max)
71.5 2788 (Book max 2777 in
72.5 2828. 26" barrel)
73.5 2882
74.5 2916

Primer started to flatten slightly @72.5 and bolt lift SLIGHTLY stiff @ 74.5. Primers never any different than @72.5 and never an ejector swipe.
67.5 to 69.5 formed a .44" group with only a 22fps increase from 68.5 to 69.5. Would you focus on loading in this latter range. Never done such a coarse load development. Seems abit slow and I know it's not the best powder, but it's what I have to work with for now. Any advice would be greatly appreciated!

 

[Gord0]

Don't have access to other popular propellants for this caliber. Due to work schedule and moving, I have little time for load development prior to deer season. Gun is recent acquisition and will be used as a backup. Shots likely 300 or less. Savage 110 in Boyd's laminated thumbhole stock. 300 WM with 24" 1:10 barrel. Using H4831SC and loaded .060" off the lands to fit mag box, I had the following:

66.5 gr. 2561 fps
67.5 2635
68.5 2679
69.5 2701
70.5 2748 (Berger book max)
71.5 2788 (Book max 2777 in
72.5 2828. 26" barrel)
73.5 2882
74.5 2916

Primer started to flatten slightly @72.5 and bolt lift SLIGHTLY stiff @ 74.5. Primers never any different than @72.5 and never an ejector swipe.
67.5 to 69.5 formed a .44" group with only a 22fps increase from 68.5 to 69.5. Would you focus on loading in this latter range. Never done such a coarse load development. Seems abit slow and I know it's not the best powder, but it's what I have to work with for now. Any advice would be greatly appreciated!

I'd work in that 68.5-69.5 range. H4831sc isn't known for great velocity, especially with anything over 180gr in the win mag. If that's what you got to work with, use it. It'll kill darn near anything inside 300yds.

 

[FURMAN]

H1000 is THE powder for 210-215 in the 300 WM.

 

[Tiny Tim]

Thanks GordO. Shot for the middle of what seemed to be a wide node last weekend, 69.0 gr. Loaded 5 each @ 68.5, 69.0, & 69.5. Definite accuracy advantage to the 69 gr load. .625 MOA @ 200 yds. Itl work for a backup for this season. Thanks for the replies!