MrWray and i both about six months ago did some informal testing using 3/8" and 1/2" plywood and sheetrock as test materials to shoot at. my test distances were from 15 to 30 feet. 30 being used as the longest possible distance within my home. our results were very similar in performance. we both posted pictures of those results. i used #4 and #7-1/2 birdshot for those tests. i can't remember exactly which birdshot MrWray used now, but he also went as far out as 30 feet as well. honestly, i wouldn't want to be on the recieving end of birdshot. Hock still argued that our tests were flawed and that neither of us knew what we were talking about!
funny thing is none of these birdshot detractors will put their money where their mouth is and stand in front of someone shooting birdshot! Hmmmm.....
is buckshot better than birdshot for SD? of course it is. but, what if birdshot is the only ammo you have available? "gee, Mr. BadGuy, wait i need to go and buy some buckshot, cause all i have is birdshot!" also due to lesser recoil with the birdshot, you can have a faster follow-up shot as well. i tested using the largest birdshot i could find, which is #4 and after my informal testing last year and a few years prior, i have complete faith in that it will stop a BG! my wife may have to rely on this shotgun and i want something she could use without the recoil knocking her on her butt when she shot it! my Winchester SXP Defender with a 18.5" barrel and 5 shot tube holds 5 rounds of #4 birdshot, and there are 5 rounds of OO buckshot in the buttstock carrier if there is a need for them.
so all you birdshot detractors and haters, let me say it this way, i don't feel the need to justify my reasons to you as to why i do it the way i do, nor do feel the need to gain your permission in my choices of ammo. if they feel that buckshot is the only choice, then so be it, but i know without any doubts waht will work if i need it.