"My very first rifle was a Winchester Mod 03 22 auto. For those of you who know, you know I couldn't afford to shoot it, the ammo was 6-7 times more expensive than regular 22 LR. Last year (60+ years later) I find a model 63 at an auction that went at a reasonable price. "
When I was a kid I always wanted a Winchester 63, but I had to settle for the Remington 550-1 previously mentioned. Fast forward to around 2005. I bought the Taurus knockoff of the Winchester 63. It's a very good facsimilie of the 63, except the wood is very dark (I don't think it is walnut, no grain at all) and the wood finish is slightly rough and dull. I refinished the Taurus wood and it is an improvement. I never had any functioning problems with the Taurus 63. I don't think Taurus made many of them and I have seen a couple at gun shows priced in the $600 range.
The idea behind the special smokeless .22 Winchester Auto ammunition needed for the Winchester 1903 (later Model 03) was to prevent the use of conventional .22 ammunition. Black powder .22 loadings were still common when the Winchester 1903 came out and if used in it, would gum up the blowback action in a hurry. Aside from the different ammunition needed, the Model 03 and the later Model 63 are very similar in design. It is difficult and expensive to feed an 03.