I have a trailside and like it alot, very accurate and reliable. The factory target that came with the pistol is 5/8" at 50 meters. I've heard of some problems with them but you couldn't prove it by me. I guess there were some slides that cracked, but I've had it for a year and a half or so and it's holding up great. It just continues to make me smile with its accuracy. I don't shoot hypervelocity rounds in it. Other than that it shoots and cycles everything I put in it, including subsonics. Mine likes the Win grey box hp's of the ones I've tried.
I have a HS 103 Sport King, but not a Victor. Beautiful pistol, nice trigger, all steel with beuatiful bluing, but it does have phenolic grips. I can't say for sure which is more accurate, but I shoot the Trailside alot more. I just can't throw that beautiful old HS in the backpack or boat or leave it in the trunk day in and day out. I don't give that a second thought with the Trailside.
I guess I don't have a problem with materials like plastic and aluminum as long as they are engineered right. Lot's of high quality replacement grips are plastic. I've never had a plastic magazine or other plastic part melt or break. Classic shotguns (Ithaca) and pistols (High Standard) have used aluminum receivers and other parts in some of their guns. I understand the steel and walnut side of things, I love my old remingtons and s&w too, but the trailside is one very nice gun and a pleasure to carry around and shoot, in part because of its light weight.
Only downside that concerns me a little is getting parts if I ever needed to.