I just finished my second season my SP-10. I grew up with pump guns and love my Remington 870, but I wanted to start shooting a 10 gauge. I thought about getting a Browning pump 10, but the SP-10 felt more natural to me. The weight took some getting used to and I had to retrain my brain not to pull back on the forend everytime I shot.
The main thing I was looking for in a 10 gauge was to get good patterns with bigger steel shot. During my first tries at a patterning board, I was getting blotchy patterns with the stock SP-10 chokes, so I ended up getting a Terror choke and was quickly impressed. I get great patterns with #3 steel all the way up to BBB. I ended up settling on 1 1/2 of B shot, which works well for the mix of geese and ducks I get. I load using Federal Hulls, RSI wads, and Steel powder.
I hunt in a salt marsh and the factory finish started rusting quickly, even when I wiped the gun down frequently. After the first season with the gun, I sent it to Birdsong to have Black-T finish put on it. The finish has held up very well this year and am really glad I had it done. Now the only rust I ever need to take care of is on my Terror choke, which I didn't have coated, and on the inside of the chamber.
My first season I had problems with the firing pin not being set on the second or third shot. I would just pull the trigger and nothing would happen even though the shell had cycled. After much frustration, I finally figured out that I wasn't releasing my finger quickly enough during the earlier shot and this would allow the next shell to cycle, but it would not allow the firing pin to be set. After I got in the habit of releasing my finger quickly during each shot, I no longer have this problem.
The trigger pull on my gun is much heavier than my other shotguns. It is 8 lbs vs 5 or so pounds on my other shotguns. I'm thinking of having the trigger weight adjusted to ease it up a bit.
One thing that still seems awkward to me is unloading the shells. For example, if I want to switch out my shells, sometimes the action gets caught up ejecting or feeding though the shells. I end up having to move the shell in the action with my finger or bang the butt of the gun on the bottom of my boat. I've tried doing it quickly, slowly, and medium speed, and it just is a pain compared to my other shotguns.
Overall, Iike the SP-10. It shoots 1.5 oz of B shot with a better pattern than I've ever been able to get a 12 gauge to shoot. I now like the heft of the gun and it helps me smooth out my swing. I certainly wouldn't want to carry it in the field, but I hunt out of my boat, so the weight isn't a drawback for me. For a combination duck/goose gun, I think this gun is a good choice. The only thing I'd like more is if Remington produced a pump 10 gauge, although I might miss the creampuff recoil of the heavy auto.