CAUTION: The following post includes loading data that is not currently published in any reloading manual. USE AT YOUR OWN RISK. Neither the writer, The Firing Line, nor the staff of TFL assume any liability for any damage or injury resulting from use of this information.
Just to try, I bought a box of 100 CP bullets from Midway. These are gas check bullets weighing 113 grains and sized at 0.313". I was using a heavy charge of AA9 and the groups starting getting good at 13.2 grains. I brought that up to 13.5 and while the cases showed no pressure signs (see picture) and easy ejection, I stopped there. Remember these were shot in 33 degree weather so things could change if it were hot. This is the most accurate HV bullet I have loaded so far. It is also short enough I believe to fit in the single 7. This load is close to the Double Tap 115 cast load. This is one you may want to try as it would be a great hunting load.
Weather - 33 degrees and light rain
Firearm - Ruger Blackhawk 327 magnum, 5.5" barrel
Bullet - Cast Performance 113 FPGC
Case - Federal
Primer - Federal 205 Small
Rifle
Powder - AA9
Weight - 13.5 grains
OAL - 1.486"
Velocity - 1626 (average of 10 shots)
Sectional Density - .166
Energy - 664 ft/lbs
