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Until you go to shoot something in low light and have to have it on 2.5 mag to see anything. If you want a march I'm a firm believer it needs to have the 52mm objective on it.

Long range hunting? Low light hunting? I guess there isn't much you can't do with 15x but it's sure nice to have more at times.

That's true I guess. But in the past I've had 42mm March in low Telly rings and had to machine the back of the mount block for the mag ring to clear. It would have still had enough to barrel...

I don't think the difference between the 42 and 52 is really going to be felt on the rifle is it? But with the mag range of the march you sure need the bigger objective to make good use of it.

No the 52mm March is much less bulky than the NF. The 42mm March is a backward step from your NF I would say the extra bulk is worth it especially if your not bush hunting.

If you don't want to de disappointed by poor low light performance, you are going to want the new 52mm version of the 2.5-25 or 3-24.
Good luck finding one second hand at this stage. I haven't seen...