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Regarding ARX heavy .40 cal:
They come in 107 grain, but not heavy like 180 since that would be the weight savings.
The theory is velocity vs. heavy weight for impact.
For woods carry, I would go with the BuffaloBore outdoorsman 180 hard cast for penetration, forget the weight savings on ammo.
If doing cutouts, it would do one on either side to keep rigidity in the center. Probably any cutouts would not be as much weight saved as titanium, though, but cheaper. But considerthe cost of custom shop time, unless you have a machinist friend.
It would seem that any other minor weight savings in parts would be minimal at best.
Good luck on your project! I love ultra light, that's why an LCR is my primary woods carry gun.
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From the sweet grass to the slaughter house; From birth until death; We travel between these two eternities........from 'Broken Trail"
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