Thread: Grouping

A 6 shot group @100yrds. 308 T3x shooting 130grn Barnes ttsx with 46grn ar2208 federal match primer and cac brass.
What would cause it to double up then shift a moa then 1/2. Is it just me. Pic to follow when I work out how to do it

Thanks Sam

Bedding or inconsistent body position behind the rifle spring to mind. Or the rifle just doesn't like that load?

Bedding, check to make sure the action is located on the recoil lug properly.

is it just me or is there no pic

Could also be the brass if it is a mix of lots. I encountered some late CAC that was considerably heavier. The .308 is also velocity sensitive and tend to string vertically if the velocity increases due to a heavy case. Weigh your cases to find out, I had some that were 10 plus grains heavier.
Grandpamac

Cheers yer sorry about no pic I couldn't work out how to upload one. Sorry. If some one could help I will get it up so you can see

Regards to photo, for my phone I have to
click on the add photo icon
Click on from computer
Click on choose file
Choose my relevant photo
It then shows the file in the little box
Click on upload file
Then wait for a varying amount of time (dependant on file size) for it to show in the text box(it shows as text until you post it up)

Resize photo to smaller size if you can

Finaly managed to get the pic sorted, has to be done on the computer. 👍

Ive seen that before when scope was moved and it HADNT yet settled it self into where it needed to be......old engineer mate always told me to move 3 clicks past where you want it then take it back...then tap scope a few times

it might be nothing...it might be something.

@Samsamdjt thats a bloody interesting pic, never seen that before.
My initial thought is a mounting screw is loose and the scope is shifting under recoil or maybe theres something come adrift in the scope itself.
Be keen to hear what others think.

Were any adjustments made during that group

a borescope before n after would tell if its scope reticle moving.

It's nothing to do with the scope or the mounts as after I shot my normal hand load using seirra game Kings and grouped up fine. And I belive it was the top two then the bottom then the middle. Realy strange must be one of those things.

so can you duplicate it ???

is there any noticable diference between your 6 cases????
really strange indeed....but at worst you still have a what?????? 1-2moa load,so all not lost ,its a good to 200-300 deer load.