I Got A question

[truck driver]

Since I have my H2O capacity of my cases just how much difference will this make in my loads I get from QL since I won't be using the default H20 cap settings?

 

[DrMike]

It can be significant, Rodger. It depends on several factors, the greatest of which is the differential between your measurement and the default setting. What is essential is that your projections will be fine tuned with this information.

 

[muleman]

Rodger,
When you combine the actual case capacity with chrono readings of known charge weights you can then tweak the burn rate of your powder and you'll get very accurate projections of speed and pressure. It really comes in handy when you change bullets or wanting to fine tune your OBT.

Scott

 

[truck driver]

Boy did I open up a can of worms with this one. I think I'm learning more than I need to know.
OK the default setting for the 35 Whelen AI is 67.507gr H20 cap OAL is 3.340" Barrel length 24"
Using a 200gr AB we slide down the chart to my load of 66grs of CFE223 and it is the step -02 case fill is 98 charge is 66.05 velocity is 2884fps P-max is 53398psi and the B-time is 1.106.
When this load was chrono it read a 3 shot average of 2907fps and I changed the bullet seating depth so the OAL was 3.395". Now that we know the actual case capacity how much does this change the B-time and more importantly the P-max?
Also the H20 Cap is for Nosler brass so I'm guessing I'll have to get a case Cap for R-P brass also if I want to keep everything equal?

 

[Dwh7271]

Here you go. Should be pretty close.
Ran two so you could see possibilities.
First is where you are (in the center)
Second takes you up to QL max
On the brass, different headstamps (makers) have different capacities
CFE is good powder IMO.

Cartridge          : .35 Whelen Ack. Imp.
Bullet             : .358, 200, Nosler AccuBond 54425
Useable Case Capaci: 67.507 grain H2O = 4.383 cm³
Cartridge O.A.L. L6: 3.395 inch = 86.23 mm
Barrel Length      : 24.0 inch = 609.6 mm
Powder             : Hodgdon CFE223 ?

Predicted data by increasing and decreasing the given charge,
incremented in steps of 0.157% 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

-01.6   94    65.01   2862    3638   52267   8117     98.3    1.116  ! Near Maximum !
-01.4   94    65.11   2867    3650   52542   8127     98.3    1.113  ! Near Maximum !
-01.3   94    65.22   2871    3661   52818   8136     98.3    1.111  ! Near Maximum !
-01.1   94    65.32   2876    3673   53098   8146     98.4    1.108  ! Near Maximum !
-00.9   94    65.43   2880    3684   53376   8156     98.4    1.105  ! Near Maximum !
-00.8   95    65.53   2885    3696   53658   8165     98.5    1.103  ! Near Maximum !
-00.6   95    65.63   2889    3708   53940   8174     98.5    1.100  ! Near Maximum !
-00.5   95    65.74   2894    3719   54225   8184     98.6    1.098  ! Near Maximum !
-00.3   95    65.84   2898    3731   54511   8193     98.6    1.095  ! Near Maximum !
-00.2   95    65.95   2903    3742   54799   8202     98.6    1.093  ! Near Maximum !
+00.0   95    66.05   2907    3754   55088   8211     98.7    1.090  ! Near Maximum !
+00.2   95    66.15   2912    3766   55379   8220     98.7    1.088  ! Near Maximum !
+00.3   96    66.26   2916    3777   55671   8229     98.7    1.086  ! Near Maximum !
+00.5   96    66.36   2921    3789   55966   8238     98.8    1.083  ! Near Maximum !
+00.6   96    66.47   2925    3801   56262   8246     98.8    1.081  ! Near Maximum !
+00.8   96    66.57   2930    3812   56560   8255     98.9    1.078  ! Near Maximum !

Cartridge          : .35 Whelen Ack. Imp.
Bullet             : .358, 200, Nosler AccuBond 54425
Useable Case Capaci: 67.507 grain H2O = 4.383 cm³
Cartridge O.A.L. L6: 3.395 inch = 86.23 mm
Barrel Length      : 24.0 inch = 609.6 mm
Powder             : Hodgdon CFE223 ?

Predicted data by increasing and decreasing the given charge,
incremented in steps of 0.155% 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

-01.6   95    65.86   2899    3733   54562   8194     98.6    1.095  ! Near Maximum !
-01.4   95    65.96   2904    3744   54851   8204     98.6    1.092  ! Near Maximum !
-01.2   95    66.07   2908    3756   55141   8213     98.7    1.090  ! Near Maximum !
-01.1   95    66.17   2913    3768   55431   8222     98.7    1.087  ! Near Maximum !
-00.9   96    66.28   2917    3779   55725   8230     98.8    1.085  ! Near Maximum !
-00.8   96    66.38   2922    3791   56019   8239     98.8    1.083  ! Near Maximum !
-00.6   96    66.48   2926    3803   56315   8248     98.8    1.080  ! Near Maximum !
-00.5   96    66.59   2931    3814   56615   8257     98.9    1.078  ! Near Maximum !
-00.3   96    66.69   2935    3826   56914   8265     98.9    1.075  ! Near Maximum !
-00.2   96    66.80   2940    3838   57215   8274     98.9    1.073  ! Near Maximum !
+00.0   96    66.90   2944    3850   57519   8282     99.0    1.070  !DANGEROUS LOAD-DO NOT USE!
+00.2   97    67.00   2949    3861   57824   8290     99.0    1.068  !DANGEROUS LOAD-DO NOT USE!
+00.3   97    67.11   2953    3873   58132   8298     99.0    1.065  !DANGEROUS LOAD-DO NOT USE!
+00.5   97    67.21   2958    3885   58442   8306     99.1    1.063  !DANGEROUS LOAD-DO NOT USE!
+00.6   97    67.32   2962    3897   58752   8315     99.1    1.061  !DANGEROUS LOAD-DO NOT USE!
+00.8   97    67.42   2967    3909   59064   8322     99.1    1.058  !DANGEROUS LOAD-DO NOT USE!

 

[truck driver]

Thanks for the 2 QL examples. The QL max has me a little confused with the P-max being below Sammii but yet is marked as Dangerous load don't use in step +00.0. ( 57591psi )

 

[Dwh7271]

I didn't change the default pressure in QL is all

 

[truck driver]

I didn't change the default pressure in QL is all

Thanks I really appreciate the info. Though I've reloaded for what seems like for ever I've never got as deep into reloading as we go here and It's like starting all over again and taking it to the next level. The learning process never ends as long as one keeps an open mind.