mikeh.. You can take this for what it's worth.. But trust me on this.. I love that necg fiber optic sight, but it is good only in very very close situations. Anything past 30-40 yds the dia. of the optic is just too big, it blocks too large of an area for more precise bullet placement. I looked at dozens of bulls in zim over my 458 Lott, yes you could shoot'em at 70yds but the optic just about covers from the bottom of the brisket to the top of the spine/shoulder. Not real comforting for that exact shot placement. I even put one on my new Dakota 450, justifying it with how close I like to stalk Mbogo. But removed it and went with a smaller silver bead because real world made me face that it is not allway's what we want that work's.. After much discusion with necg (Ican't recall his name) they are aware of the problem and have been after their contractor in Germany to produce a smaller dia. optic for a long time. Close in and low light nose to nose, that optic can't be beat. But for 85% of your shooting opertunities, it's just too large.. I have been calling them about every 3 months to see if they have smaller ones in yet, but so far no joy.450