[evalu8r]

Went to the range today with my 700 in 308. Had this gun zero at 1.5 high at 100 for over a year now. Took it to OK for hog and ram hunt with my son first week of january and was bullseye on four animals. Today the thing shoots 6" high. So far that I can tell is typically warm when I shoot this gun, but was about 20 degrees today.

So question is 40 degrees air temp going to make that much difference?
BTW shot same 150gn psp factories and same 165gr interbonds handloads

 

[264shooter]

Maybe theres some contact with the stock when it's colder or more humid.Did you check the barrel bedding and see if there is contact with stock?

 

[kdub]

Sight probably took a bump between shooting the game and at the range. Didn't say if this is scope mounted or open sights.

 

[Sinbad12-2007]

Doubt seriously if the cold would change POI but humidity sure will. Winters are pretty dry up here. Check the bedding for pressure signs / rub marks. Sure could be the sights too. Whether irons or scope, they could have moved.

 

[evalu8r]

this is an sps package I got at the big box. Has the cheap rem plastic stock that sit on a plastic button. This only thing that been done is I firelapped the barrel and adjusted trigger. Gun rode in hard case in the back of the car so im pretty sure didn't take any hard hits. Normally shoots 3/4-1 1/4 groups from bipod. (operator error) Still were 1 1/4 just high. Guess I'll wait till warms up before I make any adjustments. The windage was stil right on though. I have a Bell Carlson stock in my wish list at Midway if anyone feels sorry for me and my birthday is a month away.

 

[big dan]

it could be the stock reacting to the cold tempurature... that would be my guess because i'd imagine that there is upward pressure at the forend tip. i don't have any experience with the sps stocks so i can't offer much more than that on the stock. beings it's got a low buck scope on it who knows, the scope might of just decided to shift a bit for no appearant reason. i'm sure that the bias springs on the lower end scopes aren't held to as high of standards as even the moderately priced scopes...

 

[Chief RID]

If it is still grouping well but the group has moved it could be any thing that has already been mentioned. something has changed. When it happens to me it is usually me. I usually give it another chance at the range on a different day to prove it was just me.

 

[evalu8r]

Yeah, I really want to take a coin to the turret but just gonna wait for a warmer day

 

[Old Grump]

First time it happened to me I checked everything but the scope mount. Yup, finally tightened things up and went back to zero. It will be something simple, count on it.

 

[winbag338]

You need to check all the screws after every shooting session.

 

[zoar]

Aye aye, sir

 

[gunho1954]

has it a scope and what type. if the answer is yes, i would check screws,then check the fore end bedding for floated clearance. if not floated,and it has moved as you say ,i would float then check again. personaly, i would use a laminated stock as they are much better than the cheaper bell and carson. in saying that.i know that the dearer synthetic whizz bang stocks are very,very good. ask a benchrester.if the barrel is floated and still shoots high,loosen bedding screws,insert a thin narrow piece of bike tube rubber and NIP up screws and shoot.this will show up harmonics in the barrel at the fore end tip.also make sure that rear bedding screw is not over tightened.--hard to say for sure what the prob is as other members have said, but more info could be helpful. hope you sort it out.