I finally got some decent groups out of mine last weekend. I went to the range with 10 different loads (5 shots each) using different bullets, powders, and weights. I got several groups right near 1 inch and a couple around 3/4, so I'll be trying those combos again.
I also tweaked the gun a bit, which may have made a difference. When you take the stock off the gun, you'll notice it doesn't have a conventional recoil lug. Instead, there's a rectangular aluminum block (about 1 X 1 1/4 X 1/4) that fits into a shallow slot in the gun's receiver and a much deeper recess in the stock. In my gun, this block had a fairly loose fit in the receiver's slot. I used a center punch to spread the end of block a bit, then filed it until it was a friction fit with the receiver. A piece of tape wrapped around it did the same for the fit with the stock.
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