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I didn't do much. Just set the projectiles about half a mil or so off the front of the mag. And they feed good as. It is one of the mags with the steel insert. Just bought an older one the other day....

Just PMd you.
They are accurate which is the biggie for us

Yea just a standard tikka barrel. One is a plain t3, the other is a fluted Hunter

Keep in mind you will need a different mag for 22-250. But that sounds like a good idea to shoot 75 or 80 grain projectiles.
I am loading 75 amax's for our 223s and an getting 2800fps at mag length...