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How well does the 168 Amax go expansion wise subsonic?

you're probably not looking for an increase in fps with those..:D

Well there is less land material to resist wear.... :D I should have said would it wear at the same rate given the same loads being used.... and to that I guess we don't know... if the pressure...

So due to the reduction in land profile directly in front of the projectile, it probably is going to allow reduced pressure because of the progressive nature of the engagement, but there is also less...

So there is an extended taper of the rifling in the freebore area?

Nope not seeing anything... the first step is more tapered than the second.... thats all.....

Enlighten me.

There's nothing to see...he puts a 2 stage step until full engagement.. its smart but hardly ground breaking.. I was speaking generically about patents assuming some sort of ground breaking...

True... but he can't protect it... if I wanted a Blaser Mag/Dakota reamer I could get it any day of the week. Waste of money to patent it. Have a look around to see how many Dakota propriotery...

Yep so Carlock is trying to deal with both issues, and good on him...

What pees me off is the patent bullshit. There is nothing particularly ground breaking with Carlock's design, and sure he has...

Of course... but everyone talks about pressure when surely all that this is, is the cause of what we are trying to avoid... deformation. Tussocks point is valid its pressure/time = force which...

So if you are not getting deformation to hard brass, you are not getting deformation to the action...whats the problem? Why the issue with quality brass not showing signs of pressure/deformation?

And you need to learn that the best way to minimise the effect of a dig is to ignore it