QL request 300 Win Mag, please

[Newbury]

300 Win Mag
Browning X-bolt 26"
200 gr. Nosler AccuBond 54618 BC 0.588
New Norma brass
CCI Mag LRP #250
OAL 3.550
h1000 powder
Starting at 76.5 gr to 81.5 grs
I get very good groups 76.5-78.5 and horz. stringing above that...
I know I should be close to 2826 fps with 77 grs..
Would like to find out the muzzle vel. from 76.5-81.5 grs h1000...
Thank you
Randy

 

[bigedp51]

Newbury

Quickload needs the case capacity of the cases you are using to get a "ball park" chamber pressure. Then to tune Quickload you need a chronograph to check the velocity of your fired rounds and then you adjust the burn rate of the powder in Quickload until the velocities match.

There is no way for Quickload to give you the accurate velocities you are looking for.

My advice is to buy a Magnetospeed Sporter like I did and used it to calibrate Quickload.

The Affordable MagnetoSpeed — $179.99 Sporter Chronograph
http://bulletin.accurateshooter.com/201 ... 9-sporter/

You first need the case capacity of a cases fired in your chamber, Quickload defaults to cases with the least case capacity and this and cause variations in chamber pressure approximatly 6,000 to 8,000 psi.

 

[Newbury]

Thank you.....Randy

 

[FOTIS]

Ql is just a reference just like a loading manual. This has been stated many times before

 

[Dwh7271]

Here's the default settings run

Cartridge          : .300 Win. Mag.(SAAMI)
Bullet             : .308, 200, Nosler AccuBond 54618
Useable Case Capaci: 77.773 grain H2O = 5.050 cm³
Cartridge O.A.L. L6: 3.340 inch = 84.84 mm
Barrel Length      : 26.0 inch = 660.4 mm
Powder             : Hodgdon H1000

Predicted data by increasing and decreasing the given charge,
incremented in steps of 2.0% 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

-20.0   86    61.33   2292    2334   28954   8883     89.3    1.751
-18.0   89    62.86   2355    2463   31005   9194     90.8    1.702
-16.0   91    64.39   2418    2596   33212   9493     92.2    1.655
-14.0   93    65.93   2481    2734   35592   9777     93.6    1.608
-12.0   95    67.46   2545    2876   38159  10045     94.8    1.560
-10.0   97    68.99   2609    3022   40931  10296     95.9    1.508
-08.0   99    70.53   2673    3173   43929  10526     96.9    1.458
-06.0  102    72.06   2737    3327   47174  10734     97.7    1.410
-04.0  104    73.59   2801    3485   50696  10918     98.5    1.364
-02.0  106    75.13   2866    3647   54521  11078     99.0    1.319  ! Near Maximum !
+00.0  108    76.66   2930    3812   58684  11211     99.5    1.276  ! Near Maximum !
+02.0  110    78.19   2994    3981   63224  11315     99.8    1.234  ! Near Maximum !
+04.0  112    79.73   3058    4152   68187  11389    100.0    1.193  !DANGEROUS LOAD-DO NOT USE!
+06.0  115    81.26   3121    4327   73624  11434    100.0    1.154  !DANGEROUS LOAD-DO NOT USE!
+08.0  117    82.79   3185    4504   79595  11468    100.0    1.116  !DANGEROUS LOAD-DO NOT USE!
+10.0  119    84.33   3248    4684   86172  11496    100.0    1.079  !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 5% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 5% relative to nominal value:
+Ba    108    76.66   3008    4017   64948  10982    100.0    1.222  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba    108    76.66   2836    3573   52869  11235     97.5    1.336

Here it is if I make 77 grains equal 2826

Cartridge          : .300 Win. Mag.(SAAMI)
Bullet             : .308, 200, Nosler AccuBond 54618
Useable Case Capaci: 77.773 grain H2O = 5.050 cm³
Cartridge O.A.L. L6: 3.340 inch = 84.84 mm
Barrel Length      : 26.0 inch = 660.4 mm
Powder             : Hodgdon H1000 ?

Predicted data by increasing and decreasing the given charge,
incremented in steps of 2.0% 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

-20.0   87    61.60   2184    2119   26087   8353     82.8    1.828
-18.0   89    63.14   2245    2239   27900   8696     84.6    1.779
-16.0   91    64.68   2307    2364   29853   9031     86.3    1.730
-14.0   93    66.22   2370    2494   31956   9359     88.0    1.682
-12.0   96    67.76   2433    2629   34225   9677     89.5    1.635
-10.0   98    69.30   2497    2770   36673   9982     91.0    1.588
-08.0  100    70.84   2562    2915   39327  10273     92.4    1.537
-06.0  102    72.38   2627    3066   42196  10547     93.7    1.486
-04.0  104    73.92   2693    3221   45310  10803     94.9    1.436
-02.0  106    75.46   2760    3382   48693  11039     96.0    1.388
+00.0  109    77.00   2826    3547   52375  11252     97.0    1.342
+02.0  111    78.54   2893    3717   56392  11441     97.8    1.297  ! Near Maximum !
+04.0  113    80.08   2960    3892   60784  11604     98.5    1.253  ! Near Maximum !
+06.0  115    81.62   3028    4071   65596  11738     99.1    1.211  !DANGEROUS LOAD-DO NOT USE!
+08.0  117    83.16   3095    4254   70889  11842     99.5    1.170  !DANGEROUS LOAD-DO NOT USE!
+10.0  119    84.70   3162    4441   76722  11915     99.8    1.130  !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 5% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 5% relative to nominal value:
+Ba    109    77.00   2918    3781   57818  11272     99.2    1.284  ! Near Maximum !
Data for burning rate decreased by 5% relative to nominal value:
-Ba    109    77.00   2721    3288   47304  11025     93.3    1.408

Big difference as you can see. Merely altering the burn rates made that difference. Changing for overbore etc will make more. Shows you some of the variance possible with the same compnents.

 

[Newbury]

Dwh7271
Thank you for taking the time to run the numbers....how can I repay you??? PM sent...
Randy

 

[Dwh7271]

No need at all.
Just do something for somebody else along the way and we are good. :grin:

 

[Newbury]

Dwh7271
You were right on target w/your default setting....used a friends Magnetospeed chronograph at the range today...
200 gr Accubonds 77 grs H1000
1. New Norma cases, CCI Mag primers 2920 fps
2. New Fed. cases/pulled..primers unknown, (silver primers w/ blue sealant) 2944fps
The Hodgdon reloading data....200 AccuBond/77grs H1000=2826 fps
210 gr Accubonds 77 grs H1000
3. 1 time fired Fed. cases, CCI Mag primers 2896 fps
Noslers reloading data... 210 Accudond/77 grs H1000=2815 fps
Thanks again
Randy

 

[hubcap]

Right on Newbury. Hard to beat QL and a chrony. Glad things worked out for you.