Some numbers from February and this morning.
230 Grain Precision Delta FMJ, 4.8 WST, Winchester Brass, Winchester LPP, 1.255 OAL .470 taper crimp, fired from stock barrel Glock 21 Gen 4.
Chronograph numbers from February 6, 2022, temperature 30 degrees, 810,789,798,788,801 average 797.2.
Chronograph numbers from June 18, 2022, temperature 86 degrees, 760,768,767,761,760 average 763.2.
IME/IMO it is reverse temperature sensitive. Load is near maximum, please follow all safe reloading practices.
Just my .02,
LeonCarr