Which chamber for a custom bolt gun?

[warped]

So what do you think on rifling 3 grove 4 grove or polygonal?

The 5R has not failed me, heck even my 14.5" Saber does really well.

I really do not like less than 4 grooves, this is based on my experiences over the last 45 years.

Yeah I really did start shooting at 4-5yrs old.

By 12yrs old I was shooting 7mm Mauser and a .308win Browning.

Some kids liked to do other things, I spent my change on ammo.