Just had to chime in. I have 1200 rounds through mine so far, and my barrel seems fixed and solid. I've had some jams, FTF, FTE - but nothing I don't expect a .22 to do. I found the Remmington Golden Bullet has much less issues than the Winchester. I'm going to keep trying brands of ammo until I find what works best.
I will say this - I can't shoot the damn thing straight. I've been trying to sight it in and I'm off. I have to pick up my XD to remind myself I'm a capable shooter - but I haven't gotten the SR22 as accurate as I'm used to yet.