Dober, Just got back to So. Cal and the testing gave me something to do before my flight outta Billings. I have always read so many negative reports about RL19 and 22 and poor performance with cold temps, a real bummer as these powders have shot so well in mag calibers for me, I have been shooting 140 Accubonds and the 71 grs of Rl19 for quite awhile with stellar accuracy at all ranges, Retumbo the same with heavier bullets and RL 25 keeps all the numbers very close, I used Retumbo cause of its Extreme temp listed till I see some real hard consistant info that somethings that much better I will just keep using what has been working for me, heck I could have just kept using H4831 and made life simple, just dont work that way I guess