Sighting in 2014

tjen

Handloader
Apr 25, 2007
704
1
Took my three deer rifles out to sight in for Nov 15 deer opener. After a fowling shot in to the dirt bank with my 358win with 225gr PT's the next three shots centered the bulls eye at 100 yards with a 1.3" group (done). Next was my 336D 35 rem and the 200gr CLRN's at 2188fps printed 3/4" high on center with a 1.5" group (yep done). Had too shot three different groups with my 270win it was a 1.5" right and I strung the group vertical. Ended up with a 1.4" vertical goup with the two highest touching at +1.5".

By the time I got to my 270 the sun cleared the trees and was reflexting off the target. I expect it was me but this was the first time I used the Rem 140gr CL-Ultra and I suspect I can do better since it was a vertical string for all three groups but getting smaller.
 
I believe vertical stringing is the change of velocity. My 22-250 box ammo strings vertically as the barrel warms up. Boxed ammo can be the culprit.
 
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