We all know by now that the 10mm was downloaded to produce the SW 40 caliber cartridge. Well I now have a 10mm S&W pistol and I might as well load it to the max SAAMI specs or else I wasted my money. ( I could have bought a SW 40 if I wanted downloaded ammo.) I have been researching all the factory LoadData manuals for the hottest 10mm Auto loads and way below here is the results of my research. I am leaning toward mid range size HP bullets of 150gr-165gr for self defense so it looks like I will be using either Winchester AutoComp or Accurate ArmsAA#9 or IMR 800-X. There are some hefty loads in 200 and 220gr bullets for hunting larger critters. Pretty much mirrors medium to stout 357 mag performance. Does anyone have any experience with these and recomendations as they all produce some pretty impressive performances according to the tables. I am interested in bulkiness ( dont want to have to compress loads, how clean the powder burns, muzzle flash could be a factor if all other items were equal, cost is always important, hey and availability might be the most important criteria. Accurate Arms manual ( 2010 data ) using no 9 powder--------- 155gr AA#9 15.9gr 1414 fps 165gr AA#9 15.0gr 1341 fps 180gr AA#9 13.5gr 1242 fps 180 Speer JHP: AA#9 14.5gr 1290fps 32,600psi ( AA Manual #2) 180 XTP: AA#9 13.5gr 1242fps 34,100 psi ( AA Manual #2 ) 200gr AA#9 12.5gr 1170 fps Hodgdon manual (2010 data) ------------------------- 135gr Autocomp 9.5gr 1476fps 34,500 psi 155gr Autocomp 8.9gr 1362fps 35,700 psi 155gr IMR 800-X 9.8gr 1350fps 30,000 psi *NOTE PRESSURE 180gr IMR 800-X 9.7gr 1320fps 34,200psi ( 2004 IMR manual ) 180gr Longshot 9.5gr 1287fps 34,800 psi 200gr Longshot 8.2gr 1172fps 35,000 psi ***note Autocomp is a Winchester powder Accurate Manual (edition 3.2.2) re AA#7 180gr Hornady XTP (JHP) with a max of 10.7 grains AA#7 180gr Ranier plated HP, with a max of 11.0 grains AA#7 190gr Sierra FPJ with a max of 11.2 grains AA#7 Alliant Manual (2010 data)------------------------- 180gr Speer GDHP bullet 180gr Blue Dot 11gr 1295fps 165gr Speer GoldDot Power Pistol 10gr 1314fps Hornady 7th edition Manual------------------------ Hornady’s 180gr bullets MAX: AA #7 12.0 gr @ 1200 fps 155gr HP XTP MAX: AA#7 14.6gr. Speer #14 Manual-------- 5” barrel 180gr GDHP or TMJ-FN MAX BlueDot 11.0gr @ 1295 fps. Strangely, the Speer manual does not list AA No.9 for 180gr bullets, but does for some of its lighter bullets in 10mm.