Shot my remington versamax today. It's the turkey model with the 22" barrel. Shooting a jebs headhunter .655 and 3" federal HW tss 9s. Got 266 in 10.
I know this is a twelve gauge and a lot of the 12's are in the 400 plus territory. In fact the gentlemen who responded prior to me suggesting you can do better is getting 440 out of his 870. However, if I counted your pellets correctly, it looks like you could drop your red dot ONE click down and move that pattern to a 290 ten inch pattern. That will give you approximately 175 in the ten at fifty and you would still have in the ball park of 105 in the ten at 60 yards. Anything in the range of a 100 pellets or more in the ten ring with TSS is dead dead. I've only shot one bird in my life beyond forty, and I figure you are not looking to lob hail mary's either, but at 290 pellets in the ten give or take a few, you have way more than all you need to kill birds at forty plus yards.
The only thing really wrong with that pattern is price when it comes to shooting 280-300 out of a 12 gauge. As you know, You can shoot 280-300 out of most 20 gauge guns with the right choke and save ten dollars on every box of shells. You may be reloading, but the cost goes down either way. But thanks for sharing, as I love to see what guns are doing and appreciate guys like you who care enough to make sure their guns will kill birds instead of wounding them. Good luck in the woods.