H380 in a 250-300 Savage - any experience?

[cloverleaf]

Well- afetr doing a bunch of looking and then sme research on the Hogdon web site standing an the store I came home w/ a poud of H380. Will be looking to load some 100 Gr BT's. as listed in the Nosler reloading data. as well Also see loads for the 87 Gr and 75 Gr in the Hornady load data. All of which I use in my 250's. IS temp sensitivity a big issue with this powder? I think there are a couple folks on here who have used H380, if I remember correctly? Insights/ thoughts ? Thanks CL

 

[Blkram]

You got me curious...
SAAMI's specs for the 250 Savage is 45,000 CUP, which is 50,318 psi.
QuickLoad suggests that max in a 22" barrel (sorry, I do not recall your rifle's barrel length) with the 100 gr BT, would be 35.7 gr of H380, producing 2848 fps and 1800 ft lbs of energy.
Although on another site, it shows that the SAAMI pressure limit for the Savage Model 99 action was reduced to 47,000 psi. (Which is interesting, as this action was also chambered in the 284 Win and the SAAMI max pressure was set for 56,000 psi. I know that I have read articles in the past that gave the max design pressure for the Savage Model 99 and Winchester Model 88 rifles, but could not find it this morning in my search...and I am still looking.)
QL shows max load as 34.9 gr of H380 for 47K psi, producing 2781 fps and 1718 ft lbs of energy.

And H380 is not an Extreme powder so will be temp sensitive.

 

[cloverleaf]

I share your "confusion". Noslers own data currently lists 38,5 grains of H380 as a max load with a 22 inch barrel, 2,802 fps. In my Mauser, Im not to worried, and anyway I wont load for Max any more anyway.
Speer shows 35gr of 380 as Max with the 100 Gr hot core, at 2,604
Conversely they list CFE 223 at a max of 38 Gr. at 3,026

Theres got to be some pressure difference there!


I currently load my friends 99 with 87gr. Speers, with 39 Gr of 4350 which is right in the middle of the range (37-41gr). Speer lists H380 with an 87gr hot core between 38 amd 42 grains.

Realize I'm throwing around different bullet weights here. One thing I know is reloading for this one has never been straight forward. If I lved a little closer I pay Fotis to find me a load. Feels like "best guess" when I do it. CL

 

[cloverleaf]

You got me curious...
SAAMI's specs for the 250 Savage is 45,000 CUP, which is 50,318 psi.
QuickLoad suggests that max in a 22" barrel (sorry, I do not recall your rifle's barrel length) with the 100 gr BT, would be 35.7 gr of H380, producing 2848 fps and 1800 ft lbs of energy.
Although on another site, it shows that the SAAMI pressure limit for the Savage Model 99 action was reduced to 47,000 psi. (Which is interesting, as this action was also chambered in the 284 Win and the SAAMI max pressure was set for 56,000 psi. I know that I have read articles in the past that gave the max design pressure for the Savage Model 99 and Winchester Model 88 rifles, but could not find it this morning in my search...and I am still looking.)
QL shows max load as 34.9 gr of H380 for 47K psi, producing 2781 fps and 1718 ft lbs of energy.

And H380 is not an Extreme powder so will be temp sensitive.

BTW- I asume you are still running your 250 Savage (AI)? Whats working for you. H4350 seemed to have fewer load options listed for the 250. That and $10 less a pound made me take a chance. Maybe I made a mistke? CL