Show your Tikka ten round groups

[ResearchinStuff]

Can someone educate me as to the reason for favoring 10 round groups vs the more common 3 or 5 round groups that a lot of folks use? And is it 10 consecutive rounds without allowing the barrel to cool?

Thanks!

Sample size:

Barrel cooling:

Thread 'Cold bore zero versus (very) Hot bore zero “test”'

Sep 9, 2023

Discussions around “cold bore shifts” and “cold bore zeroes” versus “warm or hot barrel zeroes” are constant. So is the belief that barrels “walk” when they heat up or that groups open when they heat up.

After having multiple discussions, @Ryan Avery and Jake @Unknown Munitions and I set up a day to shoot and measure what happens. Quite a bit of discussion happened with getting everyone on the same page, and explaining the limitations and resolution that would be able to be measured. Basically- the more data, the mare accurate the results will be. However, there is a...

• Formidilosus
• Replies: 306
• Forum: Firearms

• 

 

[Skydog]

Sample size:

Barrel cooling:

Thread 'Cold bore zero versus (very) Hot bore zero “test”'

Sep 9, 2023

Discussions around “cold bore shifts” and “cold bore zeroes” versus “warm or hot barrel zeroes” are constant. So is the belief that barrels “walk” when they heat up or that groups open when they heat up.

After having multiple discussions, @Ryan Avery and Jake @Unknown Munitions and I set up a day to shoot and measure what happens. Quite a bit of discussion happened with getting everyone on the same page, and explaining the limitations and resolution that would be able to be measured. Basically- the more data, the mare accurate the results will be. However, there is a...

• Formidilosus
• Replies: 306
• Forum: Firearms

• 

Awesome…I look forward to diving into this info…thank you!

 

[ResearchinStuff]

There are 3 or more hornady podcasts on the topic, but the gist of it is in the one i linked. Also a long thread somewhere on this site

 

[HighUintas]

It should also be a non-cherry picked 10rd group. No removing "fliers"

 

[RocketRob16]

Got a new 6.5 creed T3X lite back from the gunsmith after a chop to 20”. Shooting factory Hornady ELD-M 140 gr. SWFA 3-15 and Sportsmatch TO-84.

 

[Skydog]

Another one from today, obviously the best of the day.

Tikka Veil K2 308. 100 yards, 10 rounds. Brand new set up… this was maybe 30 rounds in.

Definitely my best group of the day.

Without the clutter

Sent from my iPhone using Tapatalk

It should also be a non-cherry picked 10rd group. No removing "fliers"

So...just to confirm I am understanding this correctly...using the 1st screenshot in the 1st quote as an example...you would not toss out shot #1? You would zero the rifle using the center of the 10 round group rather than using the center of the 9 round cluster?

 

[HighUintas]

So...just to confirm I am understanding this correctly...using the 1st screenshot in the 1st quote as an example...you would not toss out shot #1? You would zero the rifle using the center of the 10 round group rather than using the center of the 9 round cluster?

Unless I saw that the POA was at the POI when I broke the trigger, yes. Or I would shoot another 10 or 20 to see if it repeats. If it doesn't , I'd throw it out