Hi,
That's a great question, and one I keep going around for myself too. Unfortunately, I think you may have placed too many restrictions on yourself to get a really good answer - multi-shot, CO2 and accurate may be a bit of a stretch, at least off the shelf and in current production (I'm thinking there may have been a multi-shot CO2 pistol for rapid fire competition at some point).
The thing is, a 1377 is potentially very accurate indeed, and that may be hard to match in a current multi-shot CO2. I had a chance to try a CP88 recently, and I liked it a lot. I suspect that any of the Umarex premium 8-shot revolvers are quite nice, and I think the CP88 competition is the longest barrelled of them. I've been wondering about getting the Colt version
http://www.specialtyshootingsportsoutdo ... black.htmlI noticed with the CP88 that the sights are not easily adjustable and it wasn't obvious how you'd attach any other optics. I don't think any of these pistols will compete with a godd 1377 on the accuracy front, it's just a different sort of pistol.
I have a Crosman 357 which I was using over the weekend. It's better than I remembered (and great value for the price), but I wouldn't rate it's accuracy up with the 1377 (although the sights are better). Build quality is really quite sad, but then at that price... On the other hand the Smith & Wesson is beautifully built, but 5x the asking price:
http://www.specialtyshootingsportsoutdo ... 77cal.htmlIf you could go wild on the price and accept PCP then there would be some quite different options on the table like the Brocock
http://www.specialtyshootingsportsoutdo ... l-177.htmland the Hatsan
http://www.airgunforum.ca/store/product ... cts_id=121From my experience I'd recommend not trying to get everything in one pistol and being frustrated with the compromises, but instead accept that different pistols excel at different things and enjoy each for what it does. For accuracy a single stroke pneumatic is hard to beat, the Daisy 747 is supposed to be great for a reasonable price (and is on my to-get list):
http://www.specialtyshootingsportsoutdo ... istol.htmland the Baikal is nothing short of magical, albeit a bit expensive and getting more so. The CAF store price is unbeatable at the moment:
http://www.airgunforum.ca/store/product ... cts_id=119And for multi-shot happiness I'd probably go with one of the Umarex 8-shots.
Jim