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Problem is if your home handy man lapping doesnt work the barrel maker will not warranty barrel....sounds like you have been lucky

What calibre R93 ?

The extra cost of a cut barrel is less than the cost of a couple of hundred rounds....its a easy decision in my opinion

You end up using that many cleaning products on the cheap barrel as well so...

Nice work...exciting project

1 in 8 twist barrel?

Have you gone for a 7mm 300 Norma standard shoulder or Improved?

Does Whidden make custom dies or are you using a 300 Norma Magnum die with...

Any updates on the 195 ?

This thread is about big Sevens and 195 Bergers...not about you're ability as a shooter

Some great info has been given on the subject by some knowledgeable guys that are freely sharing this info
...

Great info thanks GregD

What weight is your 7mm Fatmax?
Assuming you are using a radial brake what is recoil like?

Not the sort of calibre you want to have accuracy problems to sort out...I feel your pain
Hopefully you sort it before the barrel is burnt out😉

Nice
What flavour barrel is it?
Have you thought of going 7mm 300 Blaser Magnum?
Not so over bored but still has huge capacity

The speeds no teething issue��

Is the pressure and jump an issue?

Kiwi Greg have u got yours going?