250gr TTSx and RL-17

I checked Loaddata.com and found loads for 250 gr bullets of several brands for RL-15 and a few for RL-19.
Nothing for any 250 gr bullet with RL-17.
 
@jwp475
That's fair hauling ass.
20220410_161557.jpg
 
If we were closer, I'd trade you the RL15 or 19 for the 17 (originally designed for use in the short mag cartridges, where it works quite well!) You can e-mail Alliant and ask them. https://www.alliantpowder.com/products/powder/reloder17.aspx
Found the following, which may be of some assistance: Good luck!

300 Sierra SPBT
Alliant/Herc Reloder-17​
68.0​
2,380​
300 Barnes
Alliant/Herc Reloder-15​
64.5​
2,387​
235 Speer
Alliant/Herc Reloder-15​
76.0​
2,934​


Similar burn speed to IMR 4350.
 

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If we were closer, I'd trade you the RL15 or 19 for the 17 (originally designed for use in the short mag cartridges, where it works quite well!) You can e-mail Alliant and ask them. https://www.alliantpowder.com/products/powder/reloder17.aspx
Found the following, which may be of some assistance: Good luck!

300 Sierra SPBT
Alliant/Herc Reloder-17​
68.0​
2,380​
300 Barnes
Alliant/Herc Reloder-15​
64.5​
2,387​
235 Speer
Alliant/Herc Reloder-15​
76.0​
2,934​


Similar burn speed to IMR 4350.
@C.W.RICHTER
The 375H&H should do better than that
35 Whelen 63 grains of 2209/H4350 and 310gn Woodleigh RNSP
20220618_081205.jpg
 
Those aren't my loads. 'Just found 'em on a reloading forum. (they were probably trying to duplicate factory ammo performance.) I always used 270 TSXs for combined PG/DG hunts (no re-sighting) and 350s for DG-only. Yes. I got the 338-06 to do 2440 w/ original Barnes SPs. But, for African DG hunting, 2350-2450 fps is just fine w/ the 350s. No reason to push it any more. RL15 or 19 would be the powder to do it with. I no longer own a 375. Gave it to my son and got a 416.
 
I just ran an incremental charge test with my 375 H&H using the 250g TTSX and Reloader 17 sold to me as its identical twin Reload Swiss RS60. I got velocities up to 2889fps when the primer flattened and I called it quits. I will check the charge weights in the morning
 

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