.38 Short Colt - ICORE PF loading

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J L Rhodes's picture
J L Rhodes
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Joined: Oct. 28th, 2012
.38 Short Colt - ICORE PF loading

Love my M625 .45ACP.

BUT, recently got a new (to me) M627. Plan to use Starline .38 Short Colt brass and I have both Montana Gold 142 gr JHP and Xtreme 147 copper plated bullets.

The big question is loading data.

I have Clays, TiteGroup, and WST.

I'm told Clays is too fast for heavier than 130 gr bullets.

Might anyone have any load data for the above bullets and TiteGroup and/or WST powder??

Mark Barr's picture
Mark Barr
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Joined: Feb. 23rd, 2011
JL,  I shoot short colt, but

JL, 

I shoot short colt, but have never tried the bullets you are using.  Let me caution you, short colts are VERY TOUCHY to load. Seating the bullet too deep can dramatically spike pressure.  Be carefull to work up ANY load you may find on the internet, using a chronograph and watching for signs of excessiv pressure (including sticky case ejection, bulged cases near the base, overly flattened primers, etc)

I load 160 gr Bayou round nose with 2.7 gr of N310 loaded to 1.175 inches. This load averages 824fps in my gun and chronographed at the IRC at a power factor of 127.7.  I try to avoid any power factors above 135 with short colts.... just to be on the safe side.

Be wary of load data found on the internet.  I've seen a lot of stuff that is "too good to be true", and some that is just downright crazy...

Mark Barr

J L Rhodes's picture
J L Rhodes
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Joined: Oct. 28th, 2012
Thanks, Mark. I do have a

Thanks, Mark.

I do have a chronograph and will proceed with caution.

J L Rhodes's picture
J L Rhodes
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Joined: Oct. 28th, 2012
Finally fired first shots of

Finally fired first shots of .38 Short Colt (M627 PC).

The first load:

Montana Gold 142 gr FMJ (conical)
3.6 gr of WST (all charges were weighed on RCBS digital scale)
OAL 1.167"
Fed Sm Pistol primers

Probably about 90 degrees. Ammo never left the shade.

Shooting Chrony (Beta Master) results:

seven rounds:
Lo 854
Hi 896
Avg 867 (PF 123)
ES 42.7
SD 14
individual velocities of above seven rounds:
865.6 (last shot)
868.2
861.1
856.7
854.1
869.3
896.8 (first shot)

next eight rounds:
Lo 811.9
Hi 851.8
Avg 837.8 (PF 118)
Es 39.9
Sd 13
individual velocities of above eight rounds:
811.9 (last shot)
834.1
844.9
826.1
846.7
851.8
841.5
845.0 (first shot)

Not sure what to make of the variation. One string made 120 PF and one string didn't.

Accuracy? I forgot to take paper targets! But the load did perform well on steel.

Next load testing, with same Montana Gold 142 gr JHP:

3.6 gr WST, OAL 1.080"

Lo 867
Hi 906
Avg 888
ES 39
SD 15

3.7 gr WST, OAL 1.080"
Lo 917
Hi 944
Avg 930
ES 27
SD 10

- - - - - - - - - - - - -

3.5 gr Tite Group, OAL 1.080"

String #1:
Lo 966
Hi 999
Avg 981
ES 33
SD 12

String #2:
Lo 954
Hi 986
Avg 970
ES 32
SD 12

Accuracy seemed good.

The Tite Group loads (above) seem to show promise. Next test will be with 3.3 gr Tite Group.

Ty Hamby's picture
Ty Hamby
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Joined: Feb. 23rd, 2011
Awesome data. Keep it coming.

Awesome data. Keep it coming. The MG 142 is definitely one my list of bullets to try out. Mike Carmony swears by them. See you in a couple of weeks....

"Unnecessarily restrictive engagement requirements by default is the hallmark of a lazy or flat out terrible stage designer." ~ unknown

J L Rhodes's picture
J L Rhodes
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Joined: Oct. 28th, 2012
Another test this evening,

Another test this evening, same Montana Gold 142 gr JHP.

3.3 grains Tite Group, OAL 1.080"

Two strings, all charges weighed:

String 1:
Lo 889
Hi 912
Avg 900 (PF 127)
ES 23
SD 8

String 2:
Lo 892
Hi 908
Avg 899 (PF 127)
ES 16
SD 6

- - - - - - - -

Two more strings, same load, all charges thrown (not weighed) (Dillon 550):

String 1:
Lo 876
Hi 915
Avg 892 (PF 126)
ES 39
SD 14

String 2:
Lo 878
Hi 897
Avg 890 (PF 126)
ES 19
SD 8

Accuracy seems acceptable, although I didn't take the time to really concentrate and do my best.

I think I might be on to a decent load here. Probably should try 3.4 grains Tite Group to give a little more comfort factor in making PF for both ICORE and USPSA.

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