Best: Without a doubt, my Ultra 25-06. Shoots into .5 with factory or handloads. Has never failed to eject a case.
Worst: 243s (two), 308s (two) and several 223s. Would not group and multple fail to eject problems. One went back to NEF twice before issue was resolved. (And several members as had stocks damaged while at NEF for repairs or new barrels.) I've spent enough on shipping to buy.....Aww, let's not go there!
Do not take this as Handi bashing. You asked. Others have had better experiences. (Just as some members has not had the good luck I've enjoyed with my 25-06, 7x57, 45-70s, 30-30s, and Ultr 357 Max).
Phoneman is correct, that they are not finshed at factory. If you have the time to invest into fu..ssing with then, a lot of the issues can be worked out (rough chambers, rough bores, barrel bedding problems, poor triggers). The triggers have improved on later rifles. The factory is trying to improve ejection by going to a mechanical, rather then spring, ejector. (But I find this feature less Handi!) Some of the issues (over sized bores, undersided bores, inconsitant bores) can only corrected by NEF (or maybe Green Mountain) improving their quality control. This has been discussed several times on other threads.
These rifles are a tinkers dream come true. And that is the attraction to some owners. If you have time and desire you can fuss and tinker with them until the cows come home. But if you are expecting to be able to have a trouble free and accurate rifle right out of the box, you might be disappointed.
I take it as a crap shoot, sometimes you just get...reamed!! But I keep buying them. In fact, I'm waiting for my new 444 Marlin to arrive anyday.(Now, how sick is that?)
Wally