Yea, thats not too good shooting with that setup. I shoot those slugs and get 2" groups at 100 yards with my browning gold, and 3" groups with my 870 express.

With groups like that, you might want to try some lightfields. Other things you might want to do is shoot, and let cool for 10 min or so. See if its heat related. I know my gold does not like the third shot. So I shoot 2 shots and let cool for 15 min or more and then 2 more.

With those groups I don't think the new fast sabots will help you much. But not sure of your twist.

I have tried the Coreloks and they shot ok but had strange flyers now and then. Others are the winchester sepreme partitions. You got the new buckhammers which kick like a mule. Which I put in the same category as lightfields.

I have seen a few times where nothing shot good in a hastings, but then we tried lightfields and bam, it was hitting 3MOA groups. I just don't like how the lightfields drop like a stone past 50 yards.