Shape of my groups at 600yds?

[Ledd Slinger]

I get what your saying but when you shift your eye position, its the reticle that should not move when the proper parallax is achieved. I'm seeing a repeat pattern in all your targets. 3-2, 3-2,3-2 etc. That's not your load data so eliminate your reloading from this mix. There's no way your ammo is set up in your ammo box to accidentally produce this sequence unless on purpose. Either a fastener is loose somewhere or your reticle is dancing around on the target to shift back and forth with the shot placement or changes in your position on the gun that seem to repeat themselves. I hope you find your resolve.

I’ve actually found the opposite to be true. When something is loose on the rifle or a scope is moving, groups are very erratic with no repeatable pattern and usually point of impact will shift on the target. If you look at the last 3 targets he posted from the the same match, the point of impact is the in the same place.

The consistency of fliers in his targets tell me that it’s a tuning issue with the load because as the barrel heats up the harmonics of the steel are repeating themselves at the different temperatures.

Shooting more warming/fouler rounds can also help and is a practice used by BR shooters to get their barrels warmed up and fouled for better consistency. If used as a hunting rifle, I don’t see the point in firing rounds before a group as a means to warm the barrel because I’ve never had a deer or elk let me do that in the field. Lol. But either way, I would never shoot a group or go hunting with a rifle that had a squeaky clean bore. Always needs to be fouled

 

[chkunz]

I do not think that three five shot groups are adequate to define the group for this rifle and ammo for the level of analysis that you are doing. Imagine a rifle and ammo combination that shoots a 12 inch group long run average. Then shoot ten two shot groups and how will they look? Shoot seven three shot groups, how will they look, etc?

 

[KMart]

Are you shooting these groups over a chrono? If you are, do the high ones match up with a higher velocity

 

[Ledd Slinger]

I do not think that three five shot groups are adequate to define the group for this rifle and ammo for the level of analysis that you are doing. Imagine a rifle and ammo combination that shoots a 12 inch group long run average. Then shoot ten two shot groups and how will they look? Shoot seven three shot groups, how will they look, etc?

Read the whole thread before piping in if you want to contribute useful information. Throughout the two pages, the OP has posted pics showing 8 different 5 shot groups all having the same grouping characteristics.

 

[chkunz]

Read the whole thread before piping in. Throughout the thread the OP has posted pics showing 8 different 5 shot groups all having the same 2 flier characteristics.

I have read the whole thread and have an opinion based on what I see and my experience at data analysis. I may be wrong but I am expressing my opinion in a sincere effort to be helpful. Anyway, I will just pipe out as you say.

 

[Ledd Slinger]

I couldn’t count how many times I’ve fought trying to tune out fliers. Three shot groups giving the 2 and 1 flier, or 5 shot groups giving the 3 and 2 or 4 and 1 fliers can be frustrating if you don’t change powder or primers. Even if you get fliers to go away, the tuning node is usually way too tight. But if a person is hellbent on sticking to a certain powder or that’s all they have on hand, I’ve found that a primer swap is the fastest road to redemption

 

[JFrank]

I have been fighting flyers all season, now with a couple of harmonic corrections and a new FP spring they are stacking like cord wood .

No way to win shooting 4 out of 10 flyers so a person has to do something different, there can only be a few things in my mind. Combustion, Harmonics or Ballistics

 

[coldboreshot]

I’ve actually found the opposite to be true. When something is loose on the rifle or a scope is moving, groups are very erratic with no repeatable pattern and usually point of impact will shift on the target. If you look at the last 3 targets he posted from the the same match, the point of impact is the in the same place.

The consistency of fliers in his targets tell me that it’s a tuning issue with the load because as the barrel heats up the harmonics of the steel are repeating themselves at the different temperatures.

Shooting more warming/fouler rounds can also help and is a practice used by BR shooters to get their barrels warmed up and fouled for better consistency. If used as a hunting rifle, I don’t see the point in firing rounds before a group as a means to warm the barrel because I’ve never had a deer or elk let me do that in the field. Lol. But either way, I would never shoot a group or go hunting with a rifle that had a squeaky clean bore. Always needs to be fouled

I'm fairly certain that I was suggesting to the OP to reverify his parallax for absolute reticle stability. I've seen many issues of the same nature with folks reporting the same issue and the common denominator has been a moving reticle resulting in off-parallax. Why not start with the simple process of elimination first... I mean , really. I'm not implying its the absolute solution but one to examine. I love it when contributors think they have all the answers that they dismiss the probabilities of other suggestions in these forums.

 

[Lynn Brase]

Same load shot 2 weeks before, measures 3".

I have a question about your groups, and the targets? Where the targets benchrest targets?
What size is the X ring and ten ring on the 600 yd target? I am not a bench rest shooter or even
An "F" class shooter. What is the diff between the two targets?

 

[JFrank]

I do not think that three five shot groups are adequate to define the group for this rifle and ammo for the level of analysis that you are doing. Imagine a rifle and ammo combination that shoots a 12 inch group long run average. Then shoot ten two shot groups and how will they look? Shoot seven three shot groups, how will they look, etc?

In BR we look for a load that will Agg small so if we see a receiver spitting rounds that gets noticed pretty quickly, there isn't much point in shooting more rounds if the first couple are big or show erratic tendencies. I just don't see them getting smaller by themselves, others may have a different solution ' I just keep tuning

 

[Dub]

At 600 yards you will not know what your group is until the target has been pulled