Single Shot Break Action Rifle and Vertical Stringing

[General RE LEE]

I’ve got a Traditions Outfitter G3 break action in 300 AAC.

Subsonics group nice and tight all day, but when I shoot Hornady 110 grain VMax handloads at 2350 FPS, it will group two-three shots sub MOA and the next two shots will be close together but almost 4 MOA higher at 100 yards.

I’m going to test tomorrow to see if the system doesn’t like a hot barrel. I’m ok if it’s a 2-3 shot rifle. It’s a woods hunting gun so no plans to shoot more than 1-2 rounds anyways.

Anyone have vertical stringing issues with single shot, center fire break actions like TC, CVA or Traditions?

 

[General RE LEE]

Singled out issue. Rifle shoots great subsonic with a can, but shoot supers with a can, the stringing is impressive. Take the can off and shoot supers, it’s tight.

Subsonic with can






Supersonic with can




Supersonic without can

 

[Long Cut]

Very interesting.

I have a CVA Scout in 6.5, but have not shot it suppressed. With hand loads, I average around 1” at 100 with 5 shot groups.
That being said, I’m curious if the barrel harmonics change with the suppressor & supers as the barrel begins to heat up?

I did have an instance one July while shooting a quicker shot sequence, where I noticed group sizes progressively being to increase; Now the group size increase could easily be attributed to my shooting form breaking down as the sweat, mosquitoes and humidity began to wear me down mentally.
- I haven’t been able to replicate that, so I believe it to have been my shooting form breaking down and not the rifle heating up.

 

[General RE LEE]

Very interesting.

I have a CVA Scout in 6.5, but have not shot it suppressed. With hand loads, I average around 1” at 100 with 5 shot groups.
That being said, I’m curious if the barrel harmonics change with the suppressor & supers as the barrel begins to heat up?

I did have an instance one July while shooting a quicker shot sequence, where I noticed group sizes progressively being to increase; Now the group size increase could easily be attributed to my shooting form breaking down as the sweat, mosquitoes and humidity began to wear me down mentally.
- I haven’t been able to replicate that, so I believe it to have been my shooting form breaking down and not the rifle heating up.

I think it’s harmonics and heat. I’ll need to do another ladder and try again.

 

[Thegman]

Looks like the perfect giraffe rifle with the can and 110s...

 

[General RE LEE]

Looks like the perfect giraffe rifle with the can and 110s...

Aim for the base of the neck and let er rip.

 

[longrangelead]

I'd bet it's the scope. something about that combo jarring the scope's zero. It's almost perfectly vertical and incremental.
try a scope known to hold zero?