I went to a local indoor range today. It's 105F outside currently... Was looking to find pressure with a new 30-06 load. Using Barnes (55.2max for the 175 LRX) and Hodgdon data (59.0max for the 175 GR. SIE HPBT) and went above both with zero pressure signs.

30-06
Lapua brass 1x fired - trimmed to 2.484
Fed 210 primer
Barnes 175 LRX
H4350
Seated at 3.310"
220ft Above sea level
80F-ish (inside)

I loaded to from 53.5 to 60.0 grains (compressed load) in .5 grain increments and had zero pressure signs. I expected to find pressure signs of some kind below 60 grains but saw absolutely nothing on the brass. The bolt lift and extract was a touch heavier at 59-60 but not bad and no other indications. Was not able to chrono loads today indoors.

My rifle with the 175 LRX was in firm contact with the lands at 3.395" so currently a .085" jump, as seated.

Would one of you feed be able to feed that in to QUICKLOAD for me and tell me where I might be at?

With default water capacity, here it is:

Cartridge          : .30-06 Spring.  (SAAMI)
Bullet             : .308, 175, Barnes 'LRX'BT 30318
Useable Case Capaci: 56.210 grain H2O = 3.650 cm3
Cartridge O.A.L. L6: 3.310 inch = 84.07 mm
Barrel Length      : 24.0 inch = 609.6 mm
Powder             : Hodgdon H4350 *T

Predicted data by increasing and decreasing the given charge,
incremented in steps of 0.87% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step    Fill. Charge   Vel.  Energy   Pmax   Pmuz  Prop.Burnt B_Time
 %       %    Grains   fps   ft.lbs    psi    psi      %        ms

-08.7  104    52.50   2660    2750   52456   8356     95.8    1.224  ! Near Maximum !
-07.8  105    53.00   2685    2802   54072   8429     96.1    1.208  ! Near Maximum !
-07.0  106    53.50   2710    2855   55736   8500     96.5    1.192  ! Near Maximum !
-06.1  107    54.00   2736    2908   57450   8569     96.8    1.177  ! Near Maximum !
-05.2  108    54.50   2761    2961   59215   8636     97.1    1.161  ! Near Maximum !
-04.3  108    55.00   2786    3015   61035   8699     97.4    1.146  !DANGEROUS LOAD-DO NOT USE!
-03.5  109    55.50   2811    3070   62916   8761     97.7    1.131  !DANGEROUS LOAD-DO NOT USE!
-02.6  110    56.00   2836    3125   64861   8820     97.9    1.116  !DANGEROUS LOAD-DO NOT USE!
-01.7  111    56.50   2861    3180   66872   8876     98.2    1.102  !DANGEROUS LOAD-DO NOT USE!
-00.9  112    57.00   2886    3236   68952   8930     98.4    1.088  !DANGEROUS LOAD-DO NOT USE!
+00.0  113    57.50   2911    3292   71105   8980     98.6    1.074  !DANGEROUS LOAD-DO NOT USE!
+00.9  114    58.00   2936    3349   73333   9029     98.8    1.060  !DANGEROUS LOAD-DO NOT USE!
+01.7  115    58.50   2960    3406   75639   9074     99.0    1.046  !DANGEROUS LOAD-DO NOT USE!
+02.6  116    59.00   2985    3463   78028   9116     99.2    1.033  !DANGEROUS LOAD-DO NOT USE!
+03.5  117    59.50   3010    3521   80503   9155     99.4    1.019  !DANGEROUS LOAD-DO NOT USE!
+04.3  118    60.00   3035    3580   83069   9191     99.5    1.006  !DANGEROUS LOAD-DO NOT USE!

GRT results:

55 to 50 grains:


60 to 55 grains:


Something is really wrong!

Wow! thank you for the data! Seems as if I took it way too far yesterday. Interpreting the above data ; It seems that 2800fps should be my max velocity threshold. If 2800fps is attained, it's time to stop, back off and find accuracy. Though I am still baffled that I found no pressure signs, especially now that I see I was a very unhealthy 5 grains+ above max.

Hope it helps. Can you actually measure water capacity of fired case, this will improve accuracy of this simulation.

Jiri

Just checked the last five fired cases
(previously loaded 58.0 - 60.0)

Average of the five was 70.0 grains H2O capacity.

Barrel length of the rifle is 23"

Data corrected for 70.0gr H2O capacity and 23" barrel length:

Cartridge          : .30-06 Spring.  (SAAMI)
Bullet             : .308, 175, Barnes 'LRX'BT 30318
Useable Case Capaci: 58.020 grain H2O = 3.767 cm3
Cartridge O.A.L. L6: 3.310 inch = 84.07 mm
Barrel Length      : 23.0 inch = 584.2 mm
Powder             : Hodgdon H4350 *T

Predicted data by increasing and decreasing the given charge,
incremented in steps of 0.87% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step    Fill. Charge   Vel.  Energy   Pmax   Pmuz  Prop.Burnt B_Time
 %       %    Grains   fps   ft.lbs    psi    psi      %        ms

-08.7  100    52.50   2597    2622   49149   8798     94.9    1.230
-07.8  101    53.00   2622    2671   50611   8881     95.3    1.213
-07.0  102    53.50   2646    2722   52113   8962     95.7    1.198  ! Near Maximum !
-06.1  103    54.00   2671    2772   53657   9041     96.0    1.182  ! Near Maximum !
-05.2  104    54.50   2695    2823   55245   9118     96.4    1.167  ! Near Maximum !
-04.3  105    55.00   2720    2875   56879   9192     96.7    1.152  ! Near Maximum !
-03.5  106    55.50   2744    2927   58565   9264     97.0    1.137  ! Near Maximum !
-02.6  107    56.00   2769    2979   60304   9334     97.3    1.122  !DANGEROUS LOAD-DO NOT USE!
-01.7  108    56.50   2793    3032   62099   9401     97.6    1.108  !DANGEROUS LOAD-DO NOT USE!
-00.9  109    57.00   2818    3085   63952   9466     97.9    1.094  !DANGEROUS LOAD-DO NOT USE!
+00.0  110    57.50   2842    3139   65865   9527     98.1    1.080  !DANGEROUS LOAD-DO NOT USE!
+00.9  111    58.00   2867    3193   67841   9587     98.3    1.066  !DANGEROUS LOAD-DO NOT USE!
+01.7  112    58.50   2891    3248   69882   9643     98.6    1.053  !DANGEROUS LOAD-DO NOT USE!
+02.6  113    59.00   2915    3303   71991   9697     98.8    1.040  !DANGEROUS LOAD-DO NOT USE!
+03.5  114    59.50   2940    3358   74171   9747     99.0    1.027  !DANGEROUS LOAD-DO NOT USE!
+04.3  115    60.00   2964    3414   76425   9795     99.1    1.014  !DANGEROUS LOAD-DO NOT USE!

Your own experience beats QL any time.

If your rifle can handle higher loads, without any sign of pressure, there is nothing wrong there.

But leave a note in the cartridge box about not using those loads in any other rifle. If you would get the chop, these loads are a danger in the estate. I would also only keep a box or two laying around, and tell whoever would dispose of the gun stuff. Just saying.

quote:

Originally posted by Saeed:
Your own experience beats QL any time.

If your rifle can handle higher loads, without any sign of pressure, there is nothing wrong there.

I've found QL to be pretty darn good. I've been told that loads are for Winchester brass so other brands you should back off 2 grains and back off even more if you want longer case life. So about 3 grains back of tops seems to be a good starting point.

your better off building your own pressure loads as rifles are an inity unto themselves, QL and reloading manuals vari a good deal and are just a starting part, learn to reload and know all the pressure signs and buy a inexpensive chronograph..is one solution. If that isn't your cup of tea, you probably would do better just shooting factory ammo and its good stuff these days...