I checked into the JDJ cartridges but decided that I didnt want to get into those odd calibers, I didnt want to have to make my own ammo, Im not sure If you can buy it, if so I think it would be pricey. Something to think about is do you want to hunt with a "pistol" round or just a round that shoots good and fits your needs. I decided to go with the 30-06 barrel, mostly because it is more common and I already had dies brass and bullets. I cut the charge back slightly and went to a little faster buring powder, and Im sure Im not burning all the powder, and Im not sure of the velocity yet, I havent chronoed it yet, but it is accurate and will shoot well out to 200 yards, I havent tried it farther yet. All you mentioned whould work well for what you want, it just depends on what you want to shoot. Good luck.