I have a High Tech Specialties-stocked Zastava mini-Mauser in .223 Rem that I'm told has excess headspace.

I love the rifle so I figure I could:

1) have the factory 1-in-12" set back and rechambered to standard .223 Rem

2) same as above but .223 Imp 40 Degree (feeding gonna be ok tho?)

3) pick up a relatively inexpensive 1-in-8" twist SS FW contour barrel & do either option 1 or 2

4) get a 6mm barrel & do a 6x45mm

I like option 1 cuz it's least expensive. Option 3 I like best cuz it'll allow me to shoot whatever weight bullet I want. Not sure about #4 because Mag constraints would be tough to abide.

Anyone who has gone to the sharper shouldered Imp 40 degree or a 6x45 in this action?