Winchester AutoComp powder...

[BobWright]

I've recently tried Winchester's AutoComp powder in the revolver. My pet for a long time has been Winchester 231 but its been scarce lately, so I've tried to duplicate my performance with various powders. I've used Hodgdon's HP-38 (identical to 231, I believe) IMR SR-4756 and now AutoComp.

AutoComp was developed especially for autoloaders, but my initial tests show it working well in my revolvers.

Anybody else try it?

Bob Wright

 

[1John1:9]

I've used it to reload for my Ruger LCR. I found that I had better results when using the higher end loads with Autocomp. Got better Standard Deviations toward the higher end. Made for good loads comparable to carry ammo. I use other powders if I want a lighter load.

 

[Potatohead]

I love it, love it , love it, for autoloaders. Never tried it for revolvers.

 

[Jesse Heywood]

I have tried AutoComp in 9mm with 115 gr JHP and 124 gr LRN. 45 Colt with 255 gr Keith. 357 Mag with 158 gr LSWC. 38 Spl with 148 gr WC. I didn't have a bad load with any. My favorite is the 38 wadcutter.

 

[deadeye dick]

Jesse whats your grain wts. for the 357 and 38 spl.

 

[Blue1]

Here is some data I've accumulated in my revolvers:

Load Data

Date: 2/1/2014 Cartridge: .45 ACP Charge Wgt: 6.60
Time: Bullet Wgt, Gr: 230 Case:
Temp.: 40 Bullet Type: FMJ RN Primer: Win
Firearm: 325TR Powder: Auto Comp O.A.L./Crimp: 1.27/y

velocity, energy, deviation from
shot # ft/sec ft/lbs average velocity notes
1 754 290 38
2 721 266 5
3 729 271 13
4 678 235 -38
5 718 263 2
6 620 196 -96
7 755 291 39
8 735 276 19
9 732 274 16
10 0 -716
total: 6442 2363
shot total: 9
avg veloc. 716
avg energy: 263



Date: Cartridge: .45 ACP Charge Wgt: 6.60
Time: Bullet Wgt, Gr: 230 Case:
Temp.: Bullet Type: Lead RN Primer: Win
Firearm: 325TR Powder: Auto Comp O.A.L./Crimp: 1.27/y

velocity, energy, deviation from
shot # ft/sec ft/lbs average velocity notes
1 765 299 -33
2 816 340 18
3 765 299 -33
4 825 348 27
5 843 363 45
6 774 306 -24
7 0 -798
8 0 -798
9 0 -798
10 0 -798
total: 4788 1955
shot total: 6
avg veloc. 798
avg energy: 326



Date: 2/1/2014 Cartridge: .357 Mag Charge Wgt: 7.80
Time: Bullet Wgt, Gr: 158 Case:
Temp.: 40 Bullet Type: JHP 125 Primer: Win
Firearm: 686 Powder: Auto Comp O.A.L./Crimp: 1.59/y

velocity, energy, deviation from
shot # ft/sec ft/lbs average velocity notes
1 1187 494 6
2 1211 515 30
3 1169 480 -12
4 1177 486 -4
5 1118 439 -63
6 1214 517 33
7 1213 516 32
8 1151 465 -30
9 1190 497 9
10 0 -1181
total: 10630 4409
shot total: 9
avg veloc. 1181
avg energy: 490


Load Data

Date: 2/1/2014 Cartridge: .357 Mag Charge Wgt: 5.50
Time: Bullet Wgt, Gr: 158 Case: Win
Temp.: 40 Bullet Type: RN plated Primer: Win
Firearm: 686 Powder: Auto-Comp O.A.L./Crimp: 1.66/y

velocity, energy, deviation from
shot # ft/sec ft/lbs average velocity notes
1 620 135 -92
2 785 216 73
3 841 248 129
4 588 121 -124
5 564 112 -148
6 745 195 33
7 769 208 57
8 694 169 -18
9 806 228 94
10 0 -712
total: 6412 1632
shot total: 9
avg veloc. 712
avg energy: 181


The first two are .45 ACP out of a 4" barrel revolver, the next two are .357 Magnum from a 6" barrel revolver. Both revolvers have low round counts through them.

I'm new to the game and AutoComp was available so that's what I started working with.

Upon previewing this post, I noticed things ran together when copied and pasted, if anything is unclear, ask and I will explain

I experienced no issues with these loads, your results may vary.

Blue1