I normally agree with everything JCC has to say except on this point. We will have to agree to dissagree on this one again being that we have varying opinions, and they are just that opinions.

With my gun and many others I have helped others sight in, if you are going to shoot at 100 yards you best try the slugs at that distance. Most anything I try out of my H&R Ultra will group well at 50 yards. However with some loads the groups just fall apart at 100 yards. There is no way to know how that round in your rifle will group at longer distances with out actually shooting it at that distance. You can't just say since it was 1 inch at 50 it will be 2 inches at 100. I have shot shells that grouped 1 inch or under at 50 yards and wouldn't hit an 8 inch circle at 100-130 yards. With the right loads it's capable of 1-2 inch groups at those distances. I'm glad I didn't base it on a 50 yard sight in alone.

I will agree though that if you don't have perfect conditions when sighting in that doing the final adjustment on your scope at 50 yards may work better. That way you are not adjusting in wind drift at 100 yards. I don't adjust my scope when testing slugs though, I just shoot to see how well they group at the distances I want to hunt. I don't give much concern for where they impact, just what sort of groups I get. I can fix that later. I can try three different brands of slugs out of a gun and the groups will impact in three different places. I do the same thing with my Inline ML since the bullets and velocities are pretty simular. I zero my ML in at 130 and it's good for 150 yards with 350 grn Precision Rifle bullets. I have a better twist rate in my ML though.

Something I have noticed is that the slower twist barrels like yours (and mine) seem to do well up to about 1700 fps or so with 400 grain or so bullets or heavier. I haven't had much luck with the lighter high speed rounds available. Like said above though, every rifle is different so it wouldn't hurt to give them a try. Mine seems to like winchester platinums, I am going to try the slower federal barnes rounds when it gets nice out again. I tried the high velocity versions and they didn't work worth a darn in my rifle. They did ok at 50-75 yards, but the groups really fell apart at 100 yards and out.

My rifle does not care for lightfields either, although I didn't try every version they offer. I also agree with JCC that the newer style XTP type slugs are are better. They will most likely give better BC's and and the bullets are designed to perform better in game.

Just my opinions any way.

Paul