Load Data - Warning

[Bongo Boy]

I have found that maximum case expansion (Using STARLINE brass) consistently measures:

Starting charges: 0.431 - 0.432"
Medium-warm: 0.433"
Book maxes: 0.433 - 0.434"
A bit beyond book maxes: 0.434"
Max acceptable expansion in my G20: 0.434"
Expansion beyond 0.434" begins to reveal Glock smiles (frowns)

Wow! Most of my brass, which shows a shoulder where the sizing die stopped (but measured just above the extraction groove and below the sized area) measures about 0.424", and the nastiest looking brass is measuring up around 0.427-428". This is also Starline brass, and loads just below max (generally these were 10.6-10.7 gr HS-6 under a 165 gr JHP).

These would have been fired in a G29 and an EAA Witness Hunter.

[sqlbullet]

My Glock 29 produces the above numbers that Taterhead reported.  My Witness and Para both are tighter chambers and have smaller expansions.

Further, I find that the occasional just beyond max load will smile brass in my Para when it doesn't in my Glock.  The Para chamber was hogged out a bit by a previous owner right at the back.  I think the combination of a tight chamber plus less than ideal case head support means that some loads generate more pressure in the para, hence the smile, even thought the case head support is similar to the glock.

Goes back to working up and testing loads in YOUR gun.

[DM1906]

I have found that maximum case expansion (Using STARLINE brass) consistently measures:

Starting charges: 0.431 - 0.432"
Medium-warm: 0.433"
Book maxes: 0.433 - 0.434"
A bit beyond book maxes: 0.434"
Max acceptable expansion in my G20: 0.434"
Expansion beyond 0.434" begins to reveal Glock smiles (frowns)

Wow! Most of my brass, which shows a shoulder where the sizing die stopped (but measured just above the extraction groove and below the sized area) measures about 0.424", and the nastiest looking brass is measuring up around 0.427-428". This is also Starline brass, and loads just below max (generally these were 10.6-10.7 gr HS-6 under a 165 gr JHP).

These would have been fired in a G29 and an EAA Witness Hunter.

What is your post-size case mouth, wall, web and head diameters?  Your sizing die may be defective (too small or too little chamfer at the opening).  ANSI/SAAMI spec. is .4231" at the mouth and .4250 at the base/web.

[blastfact]

My most accurate loads are max book and farther. But not in the worthless OEM Glock barrel! LOLOLOLOL I've never shot the worthless Glock barrel.


G20 is a Blue Dot load.

The .357 Mag is a honest 1425 fps chronograph load in that pistol. 1375 out of the wifes 60 Pro.

The 10mm BD and Mag ( fed ) primer load is a honest 1575 fps load.

Why play with the useless 135gn Nosler bullet?

[Mike_Fontenot]

Why play with the useless 135gn Nosler bullet?

What makes the 135gr Nosler bullet worthless?

[The_Shadow]

I wish people would take a little more time to elaborate, rather than just throwing something out there!   
Here is my take on what he was trying to convey...

When driven at the higher speeds, it fragments to the point of shearing off pieces and separating from its core.

Nosler's 135's are also slightly under the 0.4000" as measured...many have been 0.3990" - 0.3995", that and the shorter bore riding section being shorter tend to make it less accurate at longer distance.

I think this is why not many bullet makers are making their's any lighter than the 155 grain offerings.

[pacapcop]

I use them as I walk a lot in urban terrain. I shot them at 50 yrds and not so good.

[gandog56]

Nobody should just go and use a max recipe right off. Work your way up to a max in small increments looking for any signs of overpressure (Flattened primers, primers blown out, extremely hard extraction)

I have never found the most accurate recipes near the very top velocities.

[DocModisett]

I agree with Gandog,,,    I intend to go for accuracy.... not speed,,,  I rounded up some blue dot and a couple hundred rounds of brass and some 180 gr. hard cast bullets... and when the dies that I have coming , arrive here , then I will start working up some loads... probably 5 at a time, increasing a tenth of a grain with each bracket of 5....looking at 8.2 grains of powder.... but the local guy reccomends to start with 5.2 gr..... ideas???

[The_Shadow]

DocModisett, i can tell you from personal experience with Blue Dot it needs to be pushed to burn cleanly and provide you some consistent velocities.  With that said, I have worked with the cast 175gr TC's sized at 0.4015" for years and loads between 10.2 gr. and 10.4 gr. of the Blue Dot (velocity of 1160-1180 fps) were the most accurate from my S&W 1006.  What do I mean by accurate?  130 yards skeet sized targets consistently, and even smaller.

[cwall64]

My most accurate loads are max book and farther. But not in the worthless OEM Glock barrel! LOLOLOLOL I've never shot the worthless Glock barrel.


G20 is a Blue Dot load.

The .357 Mag is a honest 1425 fps chronograph load in that pistol. 1375 out of the wifes 60 Pro.

The 10mm BD and Mag ( fed ) primer load is a honest 1575 fps load.

Why play with the useless 135gn Nosler bullet?

So, what barrel are you shooting?

[Joebrewer1]

Doc,
Please let me know I'm reloading 180 FMJ, and using blue dot

[dan10mmman]

In my Glock 20 180gr fmj I found 10gr. to be the most accurate load using Blue Dot.

[sqlbullet]

Most accurate very often is just below max.  Nearly full cases result in very uniform ignition and velocities.

[sliclee]

Correct me if Im wrong,brass fired from glock pistols are not supposed to be reloaded! Yes or no?
That bubble, bulge after being fired is now a weak link, yes or no.
I recently read a new designed die to push the bulge back to straight before being resized. That is FACT.
Is that brass now 100% perfect to resize,reload fire?  Lee