Sorry to be the bearer of bad news.
The other day when I first shot for speed over the magnetospeed I said it was 33 degrees. In reality the Ammo and gun went into a warm car out of a warm house. So I'm guessing that I was getting 3200 at around 65 degrees.
Today with the same load of 73grs. with the gun and ammo at a blistering
-7 degrees below zero, I lost 100fps and the groups went to crap.
My Retumbo and 168gr. CC still bug holed so twasn't me or the gun.
Back to the drawing board.
