so, I agree w/ Ronnie guy , kinda , sorta..
I admit I didn't read every thread.. my .02 being around .22's a long time.. my brand new .455 is stellar accuracy, opcen sights.. I cleaned.. shoot, shoot, shoot, shoot. haven't really cleaned outside of quick oil job, thing is accurate, reliable. again, I just shooting at 25yds for fun.. and some vermin. I hope to do a real clean up at about 1000rnd.. nothing yet make me want to do more. a quick overall, a quick barrel swap occasionally, I suspect the I am different than some here. I just a shooter. who cares. I am not out to shoot accuracy events. I just shoot to hit. My 455 does that at 25yds open sights, day in day out. no excessive 'break in ' period. dang accurate and reliable. I suggest, it just gets better over time as things break in.. wear in.. etc. I have no worries to hit a small target at 25yds. just saying.
k in MI