I had a truckload of 17 caliber Contender's (and quite a few semi to full custom rifles as well), for Contender's mostly in handgun lengths but also some carbines. Mine included both of the 17 rimfires, almost all of the 17 centerfires both commercial and wildcat at the time, and multiple barrels over the years for many of my favorites. IMO 14/15" and 20" are the optimum barrel lengths for all of them on the Contender platform; all of them can be very accurate in the right hands with the right loads and the best optics to amazing ranges; the hydrostatic shock they impart on game is legendary, and contray to belief most are not barrel burners using reasonable loads. And they are not as wind sensitive as some folks might think they are, will do just fine in up to moderate winds to reasonable ranges. I have a lot of shooting/hunting experience with them, at least in the high 10's of thousands of rounds fired if not well into the 100's, so I admit I am very biased toward the 17 calibers as being among the best of the best small bores. They all overlap each other in sequence ballistically, so just match the cartridge to the intended use for it and you will have a winner that you can count on to get it done.
I don't pass on load data to anyone I don't personally have first hand knowledge of their reloading prowess and ethics, and certainly not on a public forum. The small case 17's especially are very sensitive to very small increases in powder, some as little as 1/10 grain when you approach max for a given chamber. So optimum yet safe loads MUST be worked up to in EVERY firearm IMO - including two firearms of the same brand/model. None of them need max to perform very well, in fact they all have a sweet spot a little below max, and another even lower.
FWIW
