I can’t figure this out

[Korhil78]

No. The bore hasn't been cleaned

 

[Remmy700]

How well do u know this rifle? Meaning u said bore has not been cleaned so how many rounds has been fired since last cleaning? I have rifles that hold 1/4 moa till 200 rounds or so fired before they start to open up but on the contrary I have had hunting rifles that I would get same results and have groups open up after 40 rounds. Lots of factors play into this like powder, barrel quality etc. Had a hunting rifle do about same results in your pic and I took it home full bore cleaned it, shot a few rounds to foul it back out and next group I shot was less than an inch at 400. Just an idea, good luck brother.

 

[Korhil78]

Yea, I'm gonna start doing things to mark them off the list. Just thought I would get some ideas to add to the ones I already have in mind.

 

[Remmy700]

And I would also just go over rifle real good with a torque wrench and check all hardware. Action screws, base if applicable, rings and so on. U will figure it out brother.

 

[Tidus56]

The other day with the rifle I shoot best I shot a 3 inch group at 100 . The week before I had shot a .2 group with the exact same setup. My buddy that was there at the range with me, snagged the gun and shot a .3 group. So maybe it just wasn't your day, Who knows? I was amped going into shooting that day I am pretty certain heavy weightlifting and high caffeine don't mix with precision shooting. Made for a good laugh though as I couldn't shoot for crap that day. My biggest suggestion is don't over think it. I saw a dude pull his whole gun apart over a bad group.

 

[Shane Lindsey]

Do nothing....go shoot the same amount of rounds and see if it repeats or works out.

If not, try like others said, go over it, clean it really well, etc.

I have a shorty 308 that is giving me fits so I can relate. One day it's on fire and the next you want to throw it in the fire.

 

[Korhil78]

I usually clean my rifles right after shooting and have never had an issue. I decided on this rifle, I wouldn't clean it for a while like others do and see how it goes. Now look at me haha.

 

[Shane Lindsey]

I hear you. I clean after every range session. Only exception has been during cold bore mapping but that was only one shot followed by a three shot group and then put it away until next week....then repeat.

I just feel better when they are cleaned before they are stored.

 

[MudRunner2005]

Cases sorted by weight, necks checked with a concentricity gauge, annealed, resized with .002 neck tension.

Try a different powder. I never could get Retumbo to shoot in any of my rifles...Still got most of the 2nd pound I bought trying to find a load that any of them liked...Never happened.

Try IMR 7828 SSC or 7977. H1000 would be another worth trying.

 

[BountyHunter]

Shoot the gun over a regular rest. Bipods often give vertical if you load them with different pressure. Confirms not the gun.
If it is the gun, clean it!!

 

[Ozzie]

Glad to hear you're having this trouble because I am too, although yours appears far worse. I'm shooting a .264 Win Mag through a Sako 75 action with a Pac-Nor Supermatch barrel, 8-twist, 26 inches long, 150 rounds through it, scrupulously cleaned and then pre-fouled with 3 rounds at powder changes. I have read a lot about guys loving Retumbo in their 6.5's but I found that with both the 140 Bergers and the 143 ELD-Xs, my groups shrank considerably as I went up in burn rate from Retumbo to H1000 to H4831SC. Yesterday my group averages went under 1" with H4831SC (avg. of 4, 3-shot groups) and a little over that with H1000, both loaded to Hornady's book max. Retumbo was around 2" and pretty erratic. I've concluded that Retumbo is just too slow for this application/combination, at least in my rifle. Now I love Retumbo in my Weatherby 338-378 with 300 gr. Bergers, but it doesn't seem to work in my .264.

 

[Wayne Huff]

I think it's your powder ! Retumbo maybe heat sen.

 

[mmgravy]

I would put more credence in either a fouled bore or different down pressure on the bipod, especially if the rifle shot well before. Or, it was one of those days....

 

[joes264]

My .264WM mod 70 likes 129sp
68 gn retumbo. @100 1/4" n under. Clean it & shoot it again.