Grouping question need help!!

[CarbonLead]

I have been shooting my 6.5 creedmoor and I am getting sub MOA groups with shot stings of 4, 5, or 6 that seem to have groups of 2 within the string. I am wondering why I keep getting 2 close to touching or touching then a space and 2 more the same? Is it some movement of the action in the stock? I haven't bedded it yet but have the kit and will have it bedded soon. I included pics the cardboard pic was 300 yds with a 5-6 mph wind 225 degree wind from back left of me. The close up pic there was no wind at 200 yards. Thanks for the input and advice.

 

[Barrelnut]

If it does this as consistently as it appears, I would first suspect the stock. Would be a good idea to tighten the screws a bit and see if it corrects it, but the bedding job might be the real fix.

Otherwise, it could be the scope. Making sure the bases are tightened down and then the scope rings would be a good idea. Lots of time a scope can move and not be apparent to the eye or trying to move it with your hands at all.

 

[toddc]

Groups within groups can also be related to shooter form and rests.

 

[dah605]

I'm going to agree with toddc on shooter form. I used to get that all the time so I know how frustrating it is! Once I settled on a very specific cheek position on the stock, the split groups stopped happening.

I used to mount the stock from the top sometimes and from the side sometimes. I wouldn't see parallax in the scope with either, but the position is different enough that it resulting is the split groups. Now I lower my head down from the top every time.

-David

 

[mechengr]

You may just be "visualizing" the groups-within-a-group because of low sample sizes. I would wager than if you shot a more statistically significant group like 20-30 rounds, you'd get a much more uniform group, albeit, probably larger. More demonstrative of the true capability of the rifle/ammo

 

[CarbonLead]

You may just be "visualizing" the groups-within-a-group because of low sample sizes. I would wager than if you shot a more statistically significant group like 20-30 rounds, you'd get a much more uniform group, albeit, probably larger. More demonstrative of the true capability of the rifle/ammo

I don't really think I am visualizing groups within groups. You probably have a point with a larger sample size I would get a more uniform group. I think it will still have the "groups within groups". It just kinda made me wonder. In 25 years of shooting and sighting in rifles I have never had one shoot a pattern or what have you like that within a 4-6 shot string.

 

[Laelkhunter]

I was experiencing a similar situation with my .340 Weatherby. I had it rebarreled so I decided to work up a new load using RL-22 powder. I kept getting inconsistent groups no matter what bullet I tried. I got vertical stringing, with some shots touching, but the groups were two to three inches vertically at 100 yards.
I changed powders, and tried RL-19 with the same bullets. I got good groups, largest about an inch, smallest were a half inch with no vertical stringing.
Maybe a powder change could help your situation.

 

[FearNoWind]

Go back to basics. Those groups are, IMO, shooter related rather than load related.

 

[upacreek]

I had similar results after a new barrel on my 7wsm. I always shot 4 shot groups. I finally started shooting 1 and walking to the target (400yrds) and walk back, shoot again. Patterns kept occurring, but inconsistently random order. It became apparent it was not the load. It was my form. I shot prone. Shooting from a bench never reoccurred.

Just a thought.

 

[Kansaswoodguy]

What bullets and powder are you using are you trimming your brass.

 

[Wedgy]

I would suspect something like head position/cheek weld on the stock or parallax. What power is the scope set at ?(I'm assuming you didn't change power while shooting the groups).
Loose action screws/improper torqueing could also add to that.

 

[joebut1985]

I to would also agree with inconsistent shooter form, trigger pull, etc. I used to have groups very similar to yours till I decided to really diagnosis my shooting ability and position. Found that by coming off from the stock after shots to make adjustments or change something it would cause that to happen. inconsistent form causes POI shifts. But there is also the possibility of something being wrong with the weapon as well. Good luck figuring it out.

 

[CarbonLead]

Thanks for the input I appreciate it!?

 

[Wide Glide]

I always got groups like this when there was a chatty cathy at the range. They always seem to find something to talk about half way through the group.

Always bugged the hell out of me.