No PD HP in my CZ 75 D

[2bfree]

Well, after doing the push test on the Precision Delta 124 Hp I don't think I will be shooting them in my compact PCR. 1.053 - .015 = 1.039, that just seems to short for my comfort. They will be fine in my Beretta, test at 1.200 -.015 = 1.185. 1.039 that puts the bullet right at the shoulder and close to compressing the powder (HP-38) Is my thinking wrong ? I really don't want to start having to load 2 different loads for 2 different pistols. I really like the PD124 Rn at 1.140 for both.

[Bossgobbler]

you need to get a Throat reamer  and add 0.060" -0.070"( or a little more) to the free bore. then you can load the Precision Delta 124 Hp to 1.100-1.110  I added 0.050" to my SP01 shadow & Cz85 Combat.  now I can load MG 124 jhp to 1.150"

    http://38super.net/Smart%20Figures/chamberfitwebsite.jpg

[Wobbly]

2B -

Take another couple of bullets and cases and try that test again with several test subjects. You should be getting a reading closer to 1.075 to 1.080 inches.

 

[2bfree]

2B -

Take another couple of bullets and cases and try that test again with several test subjects. You should be getting a reading closer to 1.075 to 1.080 inches.

 

I did and 1.053 was actually the longest. I loaded one at 1.085 and it did not pass the plunk test.

[Wobbly]

Well, in that case I can offer you some cash for those worthless PD HP bullets !!

Then sit back and take those worthless Federal #100s too. 

[2bfree]

Well, I had a chance to shoot these out of the Beretta on Sunday, could not sleep the night before so got up and loaded them at 1.120 with 4.4 of HP-38. They shot well but could not tell a difference between the HP and the round nose but also did not bother to work up the load. Really glad I did not order a 1000 of these and the 2000 I ordered in April were RN. Now if they would only get here. Thanks for the input.
  Sorry Wobbly, next time I will ask first

[1SOW]

1.039 that puts the bullet right at the shoulder and close to compressing the powder (HP-38) Is my thinking wrong ?

Take another couple of bullets and cases and try that test again with several test subjects. You should be getting a reading closer to 1.075 to 1.080 inches.

I loaded and shot 95 test rounds in my 75 Shadow. The first were at 1.1" and shot fine but a skosh on the light side.  I ended up at 1.095"  with plenty of margin for OAL error.  I like the bullet and ordered 3K.
I may add another .1 grs of powder when my order comes in.

Your chamber 'might be exceptionally short', but I would redo the push test with at least 5 different spent cases and bullets.  Your test sounds mighty short.
You wouldn't be able to use a  MG 124 JHP as it's conical nose that tests close the same in my and many other CZ chambers.  The Zero 125gr JHP traditional ogive wouldn't meet your test results and preferrences  either.  Somethings not right.


re "is my thinking wrong?"    If you load shorter than the data, you need to decrease the powder load proportionately, so it won't be closer to compressing the powder.

[noylj]

If you start out at a starting load and work up, no problem.
If you start with a starting load, you can put the bullet almost touching the lede/rifling. For me, 0.015" of free bore is excessive.
I have a 1911 with an extremely short throat, and it does fine (and that includes lots of PD 124gn JHP)--I work up the load for it and it does its job.
1.100" is often a good starting COL, but not often an ideal COL.
Compressing 231/HP38 is not an issue. It is just one more reason that there are starting loads.
I have never adjusted COL for power. I adjust COL for accuracy and load for that COL.