I have a couple 700’s (heavy and regular barrel) with the x-mark trigger and I don’t like the stocks or the triggers which I can fix with upgrades (more money).
I bought my wife a Savage Edge (economy rifle) for half the price and I adjusted the trigger down to 3.5 lbs (spring change)…..long story short, it out performs my 700‘s which doesn't seem right
Never used a 12 so I don’t know, opinions will vary that’s for sure and you may or may not like what others do.
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Why do you want a heavy barrel ?
If you’re shooting bench, sitting position, will have some type of support, or extremely strong, no problem
But if you plan on hiking, standing or free hand a lot, you might consider something lighter.
I have both and I’m a fairly stout man, but the heavy barrel can be a pain, it will make a difference at the end of the day!