I believe it exists now .9:30 am 35 yard zero ..half mil at 50 ..2 mils at 70 .temperature at a cool 75'..Come 12:30 pm temperature rises to 90' with the rifle and scope exposed to direct sunlight .held for the same dope on the same yardages and every shot was 5 to 6 yards short of the target .Decided to get to some shade by moving to the dry creek and setting up there a few hours later and the rifle was in the cool shade .The 50 and 70 came back to the original holdovers.Is this a phenomena or am I the only one experiencing this?
Scope temperature shifting
- Thread starter Ace31269
- Start date
Not just your scope, but your gun barrel will shift as well. That's why cold bore shots in powder burners hit way different from warm bore. Either shade or shade cloth might help. I shoot only bench rest under cover so don't experience this.
Upvote 0
I get that and use to have a yest pictures of it on my old device. Still cool early morning spot on aint at hotter late afternoon.
Heat expands and cold contracts and just a fraction of a mm at the gun can be a inch difference down range. Even the guns materials ( wood , metal, plastics) as well as the ambient air pressure change + high or low humidity all factors in.. most timse its not so drastic but can be a click or two to get bak on track/ zero. I found my plastic shrouded soda straw barrel guns tend to shift most . Anyway ..
Heat expands and cold contracts and just a fraction of a mm at the gun can be a inch difference down range. Even the guns materials ( wood , metal, plastics) as well as the ambient air pressure change + high or low humidity all factors in.. most timse its not so drastic but can be a click or two to get bak on track/ zero. I found my plastic shrouded soda straw barrel guns tend to shift most . Anyway ..
Upvote 0
temp affects everything, dial in for the season ya know, itl be close enough for rocknroll ..
Upvote 0