One hole group then 1/2”??

[Snyper708]

Not what you're insinuating but he is my buddy and wouldn't call them "problems" unless they were. He has more work than he knows what to do with.

Did he do the work "pro bono"?
Didn't it fire the one hole groups before the "fix"?

 

[Chad717]

Did he do the work "pro bono"?
Didn't it fire the one hole groups before the "fix"?

Yeah but what does that matter? if it's not bedded right it needs to be done right before moving forward. When you loosened the action screws and tightened them slowly you could see the stock flexing at the bedding location and the barrel wasn't free floating.

 

[Timeee123]

I remember growing up that if we had a rifle that shot an 1 1/4 we were happy, then over time 1 inch became the standard then with technology in glass, bedding, barrels, triggers and reloading sub moa became the craze. I have 2 rifles that will shoot holes thru holes the problem is I cannot do that every time at 100 yards. A rifle that shoots a consistent hole to 1/2 inch is a great rifle, I'm not a competitive or a bench rest shooter but to me, it doesn't seem you have an issue, seems you got an A+ banger. I would be leery of changing anything considering the constant variables like wind, breathing, eye alignment, how firm your shoulder is against recoil, etc.

 

[Chad717]

I remember growing up that if we had a rifle that shot an 1 1/4 we were happy, then over time 1 inch became the standard then with technology in glass, bedding, barrels, triggers and reloading sub moa became the craze. I have 2 rifles that will shoot holes thru holes the problem is I cannot do that every time at 100 yards. A rifle that shoots a consistent hole to 1/2 inch is a great rifle, I'm not a competitive or a bench rest shooter but to me, it doesn't seem you have an issue, seems you got an A+ banger. I would be leery of changing anything considering the constant variables like wind, breathing, eye alignment, how firm your shoulder is against recoil, etc.

I definitely agree with that, and I am fine with a gun that will consistently shoot in the .3-.4 groups. It was just odd that it went from a .160 group to 1/2" , both groups shot within 10 minutes, I reload and shoot at my house with a lot of different guns and not had that happen, not that big of a deal I was just curious if anyone else had it happen and knew why. I'll load that last group and probably be good to go.

 

[7stw]

You could be in a narrow accuracy node. Any small change might be nudging out of the node....

I agree with desercj, I think you are on the ragged edge of your node, and it just isn't consistent back to back. I've had this before, and I didnt hsve to re engineer the load, just a small modificatio cured it. My old seven mag sendero.
The thing that mskes me think this, is the diagonal stringing.
That just screams harmonics, or a bedding issue. Favoring the first one moreso. Sounds like a trip to the swing board, but I think your fix is minor.

 

[CTK]

shooting a 6mmAI 87grn Vmax H4831sc, I've done a lot of reloading and never seen a gun do this, shot a one hole group at 100 yards, within 15 minutes loaded 3 more same with brass of the same lot and it shot a 1/2" group, this gun has done this on two different occasions. Does it not like the powder, bad bedding? This is a custom rifle. Anyone else have this happen and find out why?[/QUOTE

Why not shoot a couple more 3 or 5 shot groups with the load? 20 shot groups might be great for a bench rest champion, but who wouldn't pull one or 2 out of 20 with a hunting rifle.?

 

[FURMAN]

I hope you have it figured out but Ive shot countless groups in the .1s and .2s with .3-.4 guns. Like I said before not even the best ppc will agg in the .1s everyday.

 

[dmoon]

Yeah but what does that matter? if it's not bedded right it needs to be done right before moving forward. When you loosened the action screws and tightened them slowly you could see the stock flexing at the bedding location and the barrel wasn't free floating.

Chad it sounds like you're looking into all the rabbit holes, which for me has always been the fun of chasing that ag. However, I think from reading your posts you're overlooking something. If the action was not bedded properly and the stock was flexing and the barrel wasn't free floated; you would not have a consistent .5 MOA rifle in the first place. You would have a rifle that was stringing shots off high and right or high and left as you shot. Granted shooting two groups back to back would make those types of issues shine brighter as the barrel heated up and things flexed more and contacted the stock more....what has been mentioned multiple times in this thread and you have never acknowledged is that YOU have more influence on the group size changing between groups than the bedding or free floating did as those were the ONLY things that didn't change between groups.....I'm sure you'll figure it out and the bedding job most likely isn't going to hurt anything but I bet you still have inconsistancies in group sized with this rifle you figure out and can point to the mistakes that you are making behind the trigger. Good luck!

 

[TwoMore]

I hope you have it figured out but Ive shot countless groups in the .1s and .2s with .3-.4 guns. Like I said before not even the best ppc will agg in the .1s everyday.

but we all can wish ...
A lot of the time when I am dealing with a bedding issue my groups are tight but move around unless it is a major bind. if my groups all of a sudden open up I usually look at my optics or bore,A muzzle brake will develop a lip from the blast in the bore that will open a rifle up too, My shooting behavior is not always good too. i have a few rifles I bughole with but not every time