I am loading this powder in the .22-250 with a 55 grain Nosler BT. At 35 F. the load is clocking 3615 fps.

Does anyone have any experience with this powder regarding velocity/temperature curves?

KuduKing,
Ruger .22-250 24" Barrel 55 grain Sierra SBT

April 1990 - 41.1 grains for 3,591 - 40's
June - 41.1 grains for 3,598 - 77
August - 41.1 grains for 3,590 - 90's

April 1990 - 41.5 grains for 3,620 - 40's
June - 41.5 grains for 3,640 - 77
August - 41.5 grains for 3,640 - 90's

April 1990 - 42 grains for 3,660 - 40's
June - 42 grains for 3,666 - 77
August - 42 grains for 3,640 - 90's

All loads were way over "book" but not excessive. A year later I got the following with a different Lot #:

June 1991 - 41 grains for 3,712 - 70's
42 grains for 3,718 - 70's

I quit H-380 due to Lot to Lot variation but I could not say it was at all temperature sensitive.

Thanks Nick. As usual, you are usually firstest with the bestest.