before I sold my a7 270 I just shot it un suppressed with good ear plugs never an issue, if your that worried about the weight sell it and start again, but to be honest I think your over complicating it 1/2 inch at 100 yards is perfectly good enough, if you just want a rifle to bomb up goats it'd be cheaper to buy a cheap 243 or 223 than to explore re barrel and re stock options with the bonus of buying another toy and really how many goats do you want to shoot in a sitting ?
I wouldn't be over concerned about the weight of the over barrel I changed from a light un suppressed a7 to a older heavier finnbear and barely notice the difference, I mean really how much weight are you going to shave off by going DPT instead of over barrel, is it really worth the cost ?
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