All these loads were created on a Dillion 550. I am not really a Bullseye pistol shooter but I have one. I decided to load up some ammunition with an excellent powder, bullseye. I did some load development and below are the chronographed results. I was not looking for anything but an accurate load that functioned the pistol. 3.5 grains bullseye would not function, but I got reliable function and good accuracy at 4.0 grains.
As for using mixed cases versus one type of case. In my pistols, ES and STD are more sensitive to powder choice than mixed lots of brass. I will state that smaller extreme spreads and tighter standard deviations seem to occur when I am using one type of brass reloaded the same amount of times. It does not however really result in any noticeable improvement on target with pistols. Rifle accuracy is totally different.
M92 FS Beretta Bar Sto Barrel
125 LRN .356" 3.5 grs Bullseye S&W cases WSP OAL 1.110"
27-Mar-06 T = 58 °F
accurate, high percentage failure to feed
Ave Vel = 986.5
Std Dev = 9.21
ES 25.78
High 992.9
Low 972.9
N = 14
125 LRN .356" 4.0 grs Bullseye S&W cases WSP OAL 1.110"
27-Mar-06 T = 58 °F
Accurate, reliable function
Ave Vel = 1114
Std Dev = 20.63
ES 79.03
High 1167
Low 1088
N = 32
125 gr FMJ Olympic Factory
27-Mar-06 T = 61 °F
Ave Vel = 1261
Std Dev = 20?
ES 63.11
High 1288
Low 1225
N = 10
Walther P5 3.4" barrel
125 LRN .356" 4.0 grs Bullseye Lot 827 (60's/70's) Mixed cases WSP OAL 1.10"
20-Jun-09 T = 90 °F
Ave Vel = 1065
Std Dev = 15.19
ES = 41.07
High = 1081
Low = 1040
N = 8
125 LRN .356" 4.0 grs Bullseye Lot 827 (60's/70's) Mixed cases WSP OAL 1.10"
28-Jun-09 T = 93 °F
Ave Vel = 1072
Std Dev = 22.44
ES = 107.4
High = 1145
Low = 1037
N = 32
125 LRN .356" 4.0 grs Bullseye 1998&2005 mixed lot Mixed cases WSP OAL 1.10"
20-Jun-09 T = 90 °F
Ave Vel = 1038
Std Dev = 8.48
ES = 20.71
High = 1049
Low = 1029
N = 8
125 LRN .356" 4.1grs W231 Lot 8UB9 Mixed cases WSP OAL 1.10"
20-Jun-09 T = 90 °F
Ave Vel = 956.1
Std Dev = 23.57
ES = 71.09
High = 998.1
Low = 927
N = 7