870 SM 23" barrel, Sumtoy .660...2 oz TSS 9s at 40 yards. 343 in 10", 626 total on the 22"X28" poster board. That'll do. (https://uploads.tapatalk-cdn.com/20190326/9887558cfa5ff3eb2e925958709a4af7.jpg)
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Looks like it'll do the job!! I hope to start rolling my own by next season.
Very nice. Thinking of trying the apex 2oz 9's from my 660 sumtoy. I would think it would be similar to yours.
That will do it! Nice pattern.