You shouldn't have too many problems with the Contender.
I got started with the T/C Contender I had back in the mid '70's. I was loading them with a Lee hand loader. I've still got the loader and perhaps a few of the cases....... somewhere !!
My problems started with an H&R Topper. It had a very sloppy chamber and a rough barrel. I finally got rid of it. The Contender got away too, probably to pay for tuition, ect.
I've had several Hornets since then, and don't ever plan to be without one. They are very useful and practical rifles if you reload. I do, and also have a mould for cast bullets for it. With current cost of loading componenets, it's going to get plenty of use in the future.
Your Contender (if it's like the one I had) will have a good, tight chamber and will give you good service and performance.
For the very light bullets (33-35gr) H110 is still unexcelled. However, my Ruger 77/22 KBZ really likes #2400 for about 3,100fps, and a reduced velocity load at 2,400fps.
Best overall performance is with the 40gr Sierra HP-Varminter. I've even taken a number of deer with this load. (Yes, it's legal in my jurisdiction and performance was more than satisfactory).
With the 40gr and heavier bullets, Hodgdon's Lil'Gun has been unexcelled. I have however also gotten splendid accuracy from Accurate 1680 and 50gr bullets, though velocity is somewhat lower.
Yes, the cases are thin, but there are ways of dealing with this to minimize the affect it has on case life. (partially full length sizing or the Lee Collet die are my preferred way). However, you may find accuracy better with full length sizing........ I do. A loaded round "lies" in the chamber more consistently than with partially sizing as my chamber is slightly out-of-round and not true with the bore.
I've found the Sellier & Bellot brass to be superlative, however, they have .060" flashholes, and require a smaller diameter decapping pin. I've also found neck-turning the brass to help slightly with accuracy (trueing the necks) but also reduces case life due to neck splitting, which "kills" about half my brass. The other half being lost to incipient case head seperation (that bright ring they get about 3/4" above the rim after 10-15 loadings).
Winchester and Remington brass seem to be equally long lasting, with my best groups being recorded with Winchester brass. I also prefer small pistol primers to small rifle with all suitable "Hornet" powders.
Good luck, you'll enjoy your "Hornet".