I am presently messing with and reviewing an AERON / FX Streamline. It is a nice little rifle with the action housed in the FT version of the AERON (ACZ) stock, so lots of adjustability to play with. The action itself is well made, quite lightweight but not delicate and with a good adjustable trigger that puts the HFT500 / S400 / MPR to severe shame. Its weakness is a very fiddly single shot loader, but Matt at Sure Shot tells me there is an improved version on the way.
After shooting the rifle for about a few weeks I am getting some pretty good groups out of it and I expect them to improve with time.
It is pellet fussy and really lets you know which pellets it likes (pellet on pellet at 30 yards), and which it doesn't. Plus it appears to take just as much wind as anything else I have shot. It is not as sensitive as some Steyr's I have owned / used but I thought that the principle of the smooth twist barrel would mean relatively little deformation / damage to the pellets and so possibly less for the wind to grab hold of.... but it would appear not.
I am therefore left asking, if there is no advantage over conventional barrels, then what is the point? At least at UK legal velocities.
I'm going to shoot it for a while as it is a nice fun rifle to use and with the right pellets seems capable of sensible performance, I just can't figure out what the smooth twist thing is all about.