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1stmar · September 9, 2012, 08:05 PM

For the last couple of months been fine tuning a load for 22-250, this morning went to the range with some loads with a variety of oval changes. Typically groups have been .3-.6, this morning I couldn't get anything less then 1" most were 1.25 and larger. Previous range days had all been in the mid to upper 80's, this morning it was 64. Would the temperature have that much effect?
Velocitys seemed higher, but was having a problem getting readings on the chrono, it was either too close or to overcast.

September 9, 2012, 08:05 PM	#1
1stmar Senior Member Join Date: March 21, 2012 Location: Connecticut Posts: 2,378	Group spread from temperature... For the last couple of months been fine tuning a load for 22-250, this morning went to the range with some loads with a variety of oval changes. Typically groups have been .3-.6, this morning I couldn't get anything less then 1" most were 1.25 and larger. Previous range days had all been in the mid to upper 80's, this morning it was 64. Would the temperature have that much effect? Velocitys seemed higher, but was having a problem getting readings on the chrono, it was either too close or to overcast.