The "snail notch" is wrong, look'it the "gap" 'tween the snail and wood, which indicates thet the barrel should be back even more then it is for everthin to "line-up",.. but the "snail notch" is too far forward and prevent'n correct alianment!! (is ther a simular "gap" at the end of the barrel "tang"???)
I'd send it back, or at least have the lock replaced! (You know anybuddy thet you can borrow a GPR "lock" from, to compare with yore's??)
I never thot I'd see such'a "thing" concern'n Lyman/Investarms's quality control (I've owned more'n 20 of ther GPRs over the years)!!!!!!!!!!!!!
Here's anuther "thot",... if you have a set of calipers, measure the distance from the forward corner of the "snail notch" to the forward corner on the lockplate,.... I'd be innerested to know how this measurement compares to an old Investarm's lock.
Sumpthin diffinitly ain't "right"!!