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Discussion Starter #1
I'm cheap. Bought 1lb HP-38 and 100 Hornady 115gr XTP 9mm and 100 CCI 500 primers today.
Powder is $5 cheaper than HS-6.
Again, load data is hard to find, but looks to be 4.4gr or 4.6gr with max at 5.1gr.
Problem is I can't find the OAL.

Being really cheap.
Anyone have the Sierra Reloading Manual?
 

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Discussion Starter #3
That's what I found, and that's what is on the powder label for a Spr. GDHP.
I'm guessing that is a Speer bullet, but what is GDHP?
HP is hollow point, but GD?
 

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GDHP= Gold Dot Hollow Point. I use 1.135 when in doubt. Been working quite well. Lyman 49th says 4.7 to 5.1 with 1.125 oal for the Speer GDHP.

BW
 

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Discussion Starter #5
I thought maybe that was what it meant.
Anyway, going with 4.6gr and 1.125" OAL as on the powder label.
That seats half the base length before the taper.
After I get the first 50 loaded I'll take a few and see how the shoot.
 

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The complete reloading manual for the 9mm luger lists the load of 4.1gr min to 4.7 max for win 231 powder for the #35540 115gr hp-xtp bullet with C.O.L. :1.075 they say the hp38 and win231 are the same But who knows.
 

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Discussion Starter #7
See?
Nobody agrees on what it should be.
The label say 5.1gr max, start 10% below that which is 4.6gr.
So that's what I'm doing.
Also using the OAL of 1.125"
Too late to shoot today, so I try them tomorrow.
I understand what you listed, for a shorter OAL use less powder to keep the pressure within limits.
Maybe the next 50 I'll try that.
First I'm going to see if the longer OAL feeds and cycles.
 

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Discussion Starter #8
The complete reloading manual for the 9mm luger lists the load of 4.1gr min to 4.7 max for win 231 powder for the #35540 115gr hp-xtp bullet with C.O.L. :1.075 they say the hp38 and win231 are the same But who knows.
I think I'll try this at 4.4gr., anything to stretch the powder.
 

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Discussion Starter #9
Alrighty, then.
Tested the new reloads.
Bench rest with sandbags at 15 yards.
10 rounds each load.
Black circles are the 4.4gr. HP-38 with Hornady 115gr. 9mm XTP at OAL 1.075".
Other holes are 4.6gr. HP-38 same bullet same OAL.
Looks to need slight sight adjustment, shooting right (went to far with last adjustment, was shooting left)
HP-38 powder.jpg
 

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Discussion Starter #10
Reload report.
4.4gr don't work so well, stovepipes a lot.
4.6gr no problems.
 
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