I don't have a 642 powerport, but I do have a 686 powerport. I also have a 686 without the port. Both have 6'' barrels. Difference in recoil and muzzle jump with true magnum loads is noticeably different........noise level is a tad more, but not so much that I can tell with muffs on. I love the PP for the range and for hunting....I have shot 686's with aftermarket magna-porting and did not enjoy them at all, since the blast is directed back and to the side, unlike the PP.
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