Hi guys,

not that I ever plan on doing it but I would like to know the likely pressure produced from double charging one of my loads.

I previously used a load in my 30-30 that couldn't be double charged, but pursuing accuracy has lead me to a load which makes it possible. The same is true of my 6.5 x 55.

To attempt, to exclude a double charge, I weigh each case empty, charge, weigh and then seat the bullet. After I have finished loading a batch, /I place a dummy round on the scales and weigh each round against it.

If some body who has quick-load, could please run some simulation for me it would be greatly appreciated! I want to determine if I am playing with fire, and how hot that fire is!

The loads (if doubled0 are as follows:

30-30 165 grain cast RNFP seating depth .475", OAL 2.510", no filler H4227 34 grains
As above with H4198 32 grains.

6.5 X 55 140 grain cast, GC, seating depth .270", OAL 3.000", no filler, H4227 34 grains.
As above with H4198 32 grains

Thanks

That is why I do not and do not recommend using those fast powders in medium or large capacity cartridge cases; if you did double charge, bad things will happen; from blown primer to worse. 4227 is like dynamite. 4198; nothing too bad will happen; flat primers in the 30-30; in a 6.5, a little worse; Bore to case expansion ratio and all that. I don't have quick load so can't answer your question with specificity, but suffice it to say, you do not want to do it regardless of what the pressure is. I can tell you what a case full of 2400 will do to a Rem 700 243; it will melt the case head and expand the bolt nose and barrel threads. No, I didn't do it but a local guy did it, on two rifles one after the other. I disassembled them. He did not know anything was wrong; just couldn't open the bolts.

WARNING this is incredibly dangerous!!

i wouldn't take the liability for providing this information ..

lets say that it would certainly be far far far past safety

BTW, full cases usually give best accuracy

He only asked for the pressure.

quote:

Originally posted by jeffeosso:
WARNING this is incredibly dangerous!!

i wouldn't take the liability for providing this information ..

lets say that it would certainly be far far far past safety

BTW, full cases usually give best accuracy

I have deliberately double charged the30-30 and 6.5 with H4227 and H4198 to see if a double charge is possible.

It is with both powders in both cases. I could get up to 2.5 times this charge in the case.

I check the charge on two scales and calibrate the scales with a known weight!

That was my reason for asking how bad the pressure could be!

For me the best way to avoid a double charge is to charge all cases using the same load.
With the cases in a loading block visually examine for the same height powder charge using a Mag light or equivalent. Then seat your bullets.

quote:

Originally posted by andym79:
I have deliberately double charged the30-30 and 6.5 with H4227 and H4198 to see if a double charge is possible.

It is with both powders in both cases. I could get up to 2.5 times this charge in the case.

I check the charge on two scales and calibrate the scales with a known weight!

That was my reason for asking how bad the pressure could be!

quote:

Originally posted by SR4759:
For me the best way to avoid a double charge is to charge all cases using the same load.
With the cases in a loading block visually examine for the same height powder charge using a Mag light or equivalent. Then seat your bullets.

Exactly the way to go and no rocket science. This is what you also do when loading light WC loads for the .357 Magnum or the .45 LC with modern powders.

Or use TrailBoss.

quote:

With the cases in a loading block visually examine for the same height powder charge using a Mag light or equivalent.

quote:

Originally posted by SR4759:
For me the best way to avoid a double charge is to charge all cases using the same load.
With the cases in a loading block visually examine for the same height powder charge using a Mag light or equivalent. Then seat your bullets.

That is the procedure that I have used for years and I have never had a problem.

I do as the above, with one added step: I typically load 50 at a time, and as I charge each case with powder, I physically count the case number. If I get to anything other than 50 at completion, something is amiss, and it is easy to remember the number you were on if the phone rings somewhere in the middle. Alternately, you can remove the first empty (or last charged) case from the loading block to mark where you were if interrupted.

Why cant you just answer the man without preaching?

So:
30-30 with H4227 = 117080psi
30-30 with H4198 = 69545psi
6,5x55 with H4227 = 68500psi
6,5x55 with H4198 = 45730psi
The last one is well within specs!

Thanks a lot for that. So as there doesn't seem to be a great variation in accuracy between the H4198 and the H4227 in the M96, I will stick with the H4198!

The Swede is so much of a problem by the looks of the simulation!

The simulation is however wrong as far as fill% goes in the 30-30. Whenever I use a light load, I always check to see if a double charge is possible; and with the 30-30 its is with both powders! I could fit around 40 to the base of the bullet!

However the H4227 in the 30-30 could go nuclear

Should avoid it like the plague!