XISICO Model XS46U

I now have a fully tuned XS46U in .177 being setup for FT and really glad I went with it instead of the Gamo. I have a Gamo .22 Mach 1 that I paid more for than my XS. The XS is a much better quality rifle than the Gamo. My Gamo .22 is getting sold and I am going to get an XS in .22. I have heard good things on the Accu, there is a guy in SC who is supposedly the guru on those Gamo's and he can do a tune for ya. If you want his contact info let me know..... 
Mos, brother go with the XS. I am so impressed with mine. Mine shoots a 8.4gr pellet at 916fps which is plenty.
 
I have one, and I love it. It's not too pellet sensitive, HOWEVER, it is hold sensitive. Light pellets (7.33 gr JSB) have a shorter lock time than heavier ones (10.44 gr JSB). The shorter the lock time, the less spring torque there is, and the less hold sensitive the rifle is.

With heavier pellets, which I use due to the generally windy conditions here, my experience is that the off hand needs to be light and just ahead of the trigger guard. Trigger hand needs to be light, but you need to seat the palm swell firmly on the heel of your hand to keep the gun from torquing as the spring unwinds. I pull my gun onto my collarbone just a bit for the same reason.

A Melick delrin top hat is a big help in reducing torque ... shrink wrap over the (cheesy) rear spring guide smooths out the shot cycle. Honda moly grease has enough conventional petroleum grease in it to provide fuel for combustion without dieseling/detonation.

I had to make a trip to my "barrel tweaking tree" to get the POI centered in the scope, but my XS 46U will shoot 1" groups at 52 yards all day, except in a hard, gusty wind.

My $.02/YMMV

 
I got to chrono mine with my new Caldwell G5 today and SpudGunner is dead on. The RS 7.33 averages 932fps and the 5 shot groups at 25yds are one enlarged hole. Mine also shoots the H&N FTT 8.64g well they averaged 870fps as long as I used head sizes 4.51 & 4.52mm. I am shooting off a Caldwell field pod and when I shot the Crosman mag 10.5g I could fell the difference in gun movement and my groups were more open.
 
Got to shoot my XS more this weekend in between unpacking (just moved) . The more I shoot and test this rifle the more impressed I am. Mike at Dragon is obviously a "Wizard" of airguns. H&N FTT 8.64gr 4.52mm @ 35yds is giving me a 10 shot group less than a dime in size. I am shooting off a Caldwell field pod and only making enough contact on gun to lightly hold in place and get good sight pic in scope. I have moved gun to different support points in with field pod and the gun don't care, shoots same poi. Change to 10.5gr pellet and everything changes, gun does become hold sensitive and poi changes if you change support point. Not by a lot, but enough to notice.
 
"SpudGunner"I have one, and I love it. It's not too pellet sensitive, HOWEVER, it is hold sensitive. Light pellets (7.33 gr JSB) have a shorter lock time than heavier ones (10.44 gr JSB). The shorter the lock time, the less spring torque there is, and the less hold sensitive the rifle is.

With heavier pellets, which I use due to the generally windy conditions here, my experience is that the off hand needs to be light and just ahead of the trigger guard. Trigger hand needs to be light, but you need to seat the palm swell firmly on the heel of your hand to keep the gun from torquing as the spring unwinds. I pull my gun onto my collarbone just a bit for the same reason.

A Melick delrin top hat is a big help in reducing torque ... shrink wrap over the (cheesy) rear spring guide smooths out the shot cycle. Honda moly grease has enough conventional petroleum grease in it to provide fuel for combustion without dieseling/detonation.

I had to make a trip to my "barrel tweaking tree" to get the POI centered in the scope, but my XS 46U will shoot 1" groups at 52 yards all day, except in a hard, gusty wind.

My $.02/YMMV

Seems like a very reasonable gun then for the price, i have always wanted a tx 200 and this seems like the closest option for me. 
 
Mike Melick told me the B40 was a beautiful copy of the TX200, right down to the trigger, which might even be superior to the original. Trouble is, they're long gone, unless you can find a good used one.

I think you're correct that the XS46U is the next closest model that is readily available. In terms of performance only, I would put a fully-tuned MM XS46U against a TX 200 or HW97.
 
Mos, you and I both were on the fence for a good while trying to decide which underlever to buy. I almost bought a TX200 and I am now glad that I bought the XS46U. The more I shoot it the more I am impressed. For $235 fully tuned and shipped, you cannot beat it !! The accuracy of the XS is better than I can shoot and thats saying alot for me with my background in firearms. The shot cycle is very smooth. Just put a decent air gun scope on it and like Spud said I would put it up against any other underlever for accuracy.
 
"LIVIT"Mos, you and I both were on the fence for a good while trying to decide which underlever to buy. I almost bought a TX200 and I am now glad that I bought the XS46U. The more I shoot it the more I am impressed. For $235 fully tuned and shipped, you cannot beat it !! The accuracy of the XS is better than I can shoot and thats saying alot for me with my background in firearms. The shot cycle is very smooth. Just put a decent air gun scope on it and like Spud said I would put it up against any other underlever for accuracy.
I may have to pick one of these up here soon.