RE: what a difference 5 grains makes
Dphobby, I put a Wal-mart clearance special Simmons ProDiamond shotgun scope on. It's nothing special, but I got it for 40 bucks and it has 4" of eye relief. My old Bushnell didn't have enough eye relief and the last time I came back from shooting I had a black eye like I had been in a bar fight. I used to shoot lighter loads (like 80 grains 777), but when I started shooting loads around 100 grains the eye relief just wasn't enough for the extra recoil. It's only a 4 power, which makes it hard to shoot very small groups at 100 yards, but it should get the job done for hunting.
I'm not sure if I'm ready to try weighing charges - I just don't know if it's worth it. I found it very interesting that the Harvestor sabots seem to shoot better in general with this rifle than the MMP. The reason is, the Harvestors are much, much easier to load - they slide down with only slightly more pressure than it takes to load Powerbelts. The MMP's load noticeably harder. I always thought that the tighter the sabot, the better the accuracy. Anyone experience this?