Been playing some recently with loads for the double 12 and it's been interesting. 7/8 oz slugs at 1800 seem to be right on the money as far as regulation goes but not interested in factory foster slugs. Decided to push the .735" roundballs as hard as I could with fast rifle powders as per Ed Hubel's research. Didn't like the 4227 loads but 4759 seems to be a winner for me. At 80 grns behind a 585 grn roundball this thing bellers. Velocity should be 1700+. No it didn't regulate but got close. As loads progressed higher you could watch the recoil have less and less effect on the slug. Got to about 5" spread but that's as good as it gets with these heavy rballs. Going to go th a .715" RB which should weigh 60+ grns less. Hoping the increase in velocity and reduction of recoil will be enough to bring it in the last few inches. Anyone shooting a boregun, parodox, sluggun must read Ed Hubel's 12 guage from hell thread. He knows more about shotgun handloading than any other person on the web. Ed works hard to keep his thread updated and more people should educate themselves as to Eds ways. Lots of knowledge that can crossover to everyday use. Make Eds threads a sticky.