Alright, I'm back from shooting and patterning the buckshot. I patterned 3 Bren., 3 S&B and 2 Win. Super-X (all I could find) in OO Buck. They were done from 30 feet and all patterned nicely. I used my Moss. 500 with a 18.5 inch fixed cylinder choke barrel. I measured the length of the pattern by taking the longest distance between any two pellets.
The S&B patterns were 7.5 inches, 8 inches and 9 inches. This load would actually have very tight groups if it didn't have flyers. When I dropped off the 3 farthest out pellets (making it a 9 pellet load) the group size shrunk to about 5 inches.
The Win. Super-X patterned at 6.5 inches and 6.75 inches. This was the tightest grouping of the three, with one problem. On the 6.75 pattern, only 7 pellets passed through the paper. The other 2 were off in lala land for all I know because there we no signs of them to be seen. I was shooting at 18x24 inch sheets of paper also.
The Brennekes patterned at 6.5 inches, 7 inches and 7.25 inches. They had the overall least felt recoil and the roundest patterns. S&B had nice patterns other than the flyers and Super-X had almost all the pellets in the outer inch or two of the pattern.
I also shot a round of the brenneke into the device I built that no one has a clue what I'm talking about. Well it blew apart on the first shot so I've no clue how far the pellets penetrated, but the ones I recovered had shed most of the copper plating and were very deformed, but retaining most of there size. Thats a plus of using this ammo in my book though, a deformed pellet will do more damage than a perfectly round one. It was a pure brain fart on my part not to save them and scan them so you guys could see. I also figured out what I did with the last round, I cut it open so I could have a closer look at the pellets. If only I had saved the recovered ones I could also weight them on my powder scale to see the percentage of retained weight more accurataly than eyeballing it. Sorry bout that.
My final thoughts go something like this. The Brennekes are good buckshot, the pattern well and recoil is more than manageable. The Winchesters would be nice if they didn't have any phantom pellets, they kicked a bit more than Bren. but it was still under my tolerance level. They also had a star crimp, so on some shotguns you don't have to cut capacity by one when using the roll crimped Bren or S&B. My mossberg holds 5 of any of them in the tube so it isn't an issue for me though. The S&B kicked the most, had flyers and from my personal experiance with shooting them before hand leave you're barrel with the most fouling. They aren't the best but they are often the cheapest, but now that my personal supply of them is down to almost nothing, I just might switch over to another brand. I also don't like the talk of me having to replace my extractors and some springs because I've already shot about 500 through my Mossberg.
Those were my findings, This wasn't a very expansive test either with how little ammo I've got on hand to pattern, but it is better than just guessing what might happen. Hope it helps, and any comments and questions are welcome.
Sincerely,
Adam