I have a Load worked up for my 300 WinMag that will print 3/4" at 100yards if I do my part in ~40F weather but now that its ~90F outside I cant get even a 2" group.
I tried to adjust the velocity buy backing off the powder a little bit to get it close to the MV of the 40 degree weather load, still no dice.
I havent changed anything from my initial load (other than a few 10ths of powder to adjust the velocity(NOT the data listed below)). no clue what is wrong.
Load data from my data book Reference:
Temp: 43F
Powder: 67gr IMR 4350
Bullet: 210gr Nosler RDF
Primer: CCI No.250 Large Magnum
Shot:
1: 2768
2: 2769
3: 2776
4: 2766
5: 2766
AVG: 2769
SD: 4
ES: 10
Temp: 89F
1: 2791
2: 2795
3: 2765
4: 2804
5: 2797
AVG: 2791
SD: 15
ES: 39
I tried to adjust the velocity buy backing off the powder a little bit to get it close to the MV of the 40 degree weather load, still no dice.
I havent changed anything from my initial load (other than a few 10ths of powder to adjust the velocity(NOT the data listed below)). no clue what is wrong.
Load data from my data book Reference:
Temp: 43F
Powder: 67gr IMR 4350
Bullet: 210gr Nosler RDF
Primer: CCI No.250 Large Magnum
Shot:
1: 2768
2: 2769
3: 2776
4: 2766
5: 2766
AVG: 2769
SD: 4
ES: 10
Temp: 89F
1: 2791
2: 2795
3: 2765
4: 2804
5: 2797
AVG: 2791
SD: 15
ES: 39