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Success :thumbsup:

Problem sorted .

Changed the spring to a 10% stronger one from Gun Works today .
Will give it a run this weekend to see if it makes a difference .

https://i.imgur.com/wGC0p2A.jpg

Thanks for reading and understanding my posts :thumbsup:

As I’ve tried to explain, the Chamber / Case dimensions aren’t the problem , they have been checked and verified.
The problem seems to be...

Ive got 2000+ BR4’s that I want to use up .

Yeh ,

I’ve been doing that , since someone mentioned it .
The replacement spring will be here soon and then I’ll try shooting the BR4’s again.
I shot some load development loads again yesterday...

It’s new Brass , never been fired .
Measured with my Hornady comparator set , the shoulder is fine .

Just an update on this .

I borrowed a mates bore scope and inspected the inside of the bolt to make sure that there wasn’t any rubbish or damage internally that would be effecting the travel of...

Ive had an interesting time this weekend testing some .223 loads in a new to me Tikka .
When I initially got it I just ran a selection of factory ammo through it and was very happy with the results...