A 28 gr LFN will handle a .5 nose VERY well, but it is lightest weight I'll make for that nose length. You have read of what the 240 Keith has done at long ranges. The 280 LFN started at equal speeds will do more and at longer distences, with better accuracy. The main objective of a .5 nose, as I stated earlier, is to get maximum power potential, but also to miinimize jump to the rifling., and hit it with a wider first drive band to minimize stripping of the rifling engagement.
You said that you wanted to shoot it most with light target loads, so I recommended a shorter nose length, to minimize recoil and powder consumption, yet allow more than adaquate power for game out at longer ranges, with superb accuracy.
With a .5 nose the rounds look a lot more classy, because the bullet and OAL look so much bigger, so it is wonderful for bar talk and story telling. It will perfrom very well with light target loads also, but should only be useed with very easy to ignight, fast burning powders with light loads. Use Accurate 9 or similar easy to ignight powder for loads in the 1100 to 1300 fps range, and 296 H110 for loading hotter. Max speed at standard working pressure using the slower powders and LBT bullet lube, with gas checked bullet, will be something over 1600 fps, maybe 1700 fps. --------------- Did I mention that this is a power bullet?