For me, it’s a toss up between the OG 6.5 and the ZG 6.5. I don’t have a favorite between them. If I was starting from just published stats, I’d probably pick an Airlock suppressor for most hunting applications. Nothing I have yet encountered would change that. But if I was someone who already owned an OG 6.5, I wouldn’t sell it to get a ZG 6.5. And I certainly can’t tell enough difference between them in field use to say that one is definitely better than the other.
At the range, the OG 6.5 is a pretty clear winner for me.
Just due to timing, I got to use the OG 6.5 a lot this past season. It performed really well. The one opportunity where it was necessary - the first shot, 120-yards offhand, on my brother’s 7-pointer was a miss - the deer never reacted to the miss. No idea whether it would have had the same outcome with a different suppressor.
Both were great to carry on a 24” .25-06. At a total weight of about 10.8 pounds, I could not really tell the difference in weight between the two cans. Both shot to the same POI on both rifles on which I tested them.
I only got to use the ZG 6.5 for three days at the end of the deer season. I just carried it to see how it felt since I was tagged out on bucks, didn’t see any coyotes, and didn’t feel like shooting a doe. No issues at all with it. I never noticed the couple of ounces lighter weight or the slightly longer length when compared with the OG 6.5.
Going forward, the ZG 6.5 is going to stay on my Sauer 100 in 6.5mm CM. That rifle is deliberately setup to be lighter - not ultralight - but just weight conscious. It has the Trijicon AccuPoint 3-9x40 (14.3 ounces) as opposed to the SWFAs (22 ounces).
The OG 6.5 will stay on the .25-06. They were a very successful combination this past year.