Your cut finger is a new one, no one has ever reported that before, pop opens are usually caused by shooter error from not cleaning oil from the latch and latch shelf, or on a new gun, not closing it firmly as stated in the owner's manual.
But glad ya got the 44mag shooting good, they have a long history of poor accuracy up until Marlin started making the barrels early last year, many here have sworn off them due to that, but slowly it's gaining a good reputation as a great shooter as more of the new barrels have been bought, just bought one myself not long ago to get closer to having a rifle of every chambering H&R ever made, not many left to achieve that goal.
Tim