Quickload question 7mm-08, W760

[pharmseller]

I'm going to load some 140 Accubonds with W760, WLRM. T3, 22 7/16" barrel.

What does Quickload say?


Thanks,

P

 

[Wyo7200]

It says 56.41gr is too much. :lol:

 

[Wyo7200]

I think this forum has the most QL estimates than any other forum I've seen. May find some decent accuracy around barrel times associated with the 2636 fps and 2756 fps velocities.

Cartridge          : 7 mm-08 Rem.
Bullet             : .284, 140, Nosler AccuBond 59992
Useable Case Capaci: 46.790 grain H2O = 3.038 cm³
Cartridge O.A.L. L6: 2.800 inch = 71.12 mm
Barrel Length      : 22.5 inch = 571.5 mm
Powder             : Winchester 760

Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.0% 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

-10.0   91    41.40   2517    1970   39106   8568     90.4    1.305
-09.0   92    41.86   2547    2017   40427   8685     91.0    1.284
-08.0   93    42.32   2577    2064   41797   8799     91.6    1.264
-07.0   94    42.78   2606    2112   43217   8911     92.1    1.245
-06.0   95    43.24   2636    2160   44689   9021     92.7    1.226
-05.0   96    43.70   2666    2209   46217   9128     93.2    1.207
-04.0   97    44.16   2696    2259   47802   9232     93.7    1.189
-03.0   98    44.62   2726    2310   49447   9333     94.2    1.171
-02.0   99    45.08   2756    2361   51155   9432     94.7    1.153
-01.0  100    45.54   2786    2412   52929   9527     95.1    1.135  ! Near Maximum !
+00.0  101    46.00   2816    2464   54772   9619     95.6    1.118  ! Near Maximum !
+01.0  102    46.46   2846    2517   56687   9708     96.0    1.101  ! Near Maximum !
+02.0  103    46.92   2876    2570   58676   9793     96.4    1.085  ! Near Maximum !
+03.0  104    47.38   2906    2624   60748   9875     96.8    1.068  !DANGEROUS LOAD-DO NOT USE!
+04.0  105    47.84   2936    2679   62903   9953     97.1    1.052  !DANGEROUS LOAD-DO NOT USE!
+05.0  106    48.30   2966    2734   65125  10028     97.5    1.037  !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 10% relative to nominal value:
+Ba    101    46.00   2969    2740   66592   9641     99.5    1.032  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba    101    46.00   2618    2131   44302   9100     87.7    1.229

 

[pharmseller]

Wyo7200,
Thank you very much for the info. I'm trying to replicate my Big Game load velocity of 2850 ft/sec. Looks like 46-46.5 should do it.



P

 

[Wyo7200]

No problem. However, it can be -/+ 2-3gr depending on your cases water capacity and actual seating depth. It's a game changer in Quickloads estimates.

 

[SJB358]

Pharmseller, any RL17 out your way. Works real well in the 7x57 Mauser with 140's and 150's. Bet it would work nice in the 7-08 as well.

 

[wildgene]

...RL-17 is very dangerous, @ temps below 60* it won't go "boom", @ temps over 70* it goes "BOOM" w/ like a gazillion PSI. If you have any RL-17, I've got a backhoe & a couple million ac. of wilderness just out the backdoor, send it to me & I'll see it's disposed of properly... :mrgreen: :twisted: :roll: :shock: :lol:

 

[SJB358]

...RL-17 is very dangerous, @ temps below 60* it won't go "boom", @ temps over 70* it goes "BOOM" w/ like a gazillion PSI. If you have any RL-17, I've got a backhoe & a couple million ac. of wilderness just out the backdoor, send it to me & I'll see it's disposed of properly... :mrgreen: :twisted: :roll: :shock: :lol:

When you fill up Genes area with 17 I'll take what's left over.

 

[DrMike]

Such generosity! My, your kind offers bring a tear to my eye. :mrgreen:

 

[Wyo7200]

I chrono'ed some R17 22-250 loads when it was 9F (everything 'cept the chrono was in the car overnight) and chronographed when we had a heat wave and the temps reached 65F. There was 1 fps loss for each degree of difference between the two temps.

I'm wondering, what weighting factor would you use when you run 7-08 mm? I searched around the interwebz a little and came up with the cartridge being very efficient so I left it as .5. Wondering if .45 or .4 would be the better choice? Either way, 56.4 gr is still too much.

 

[pharmseller]

I had 2 5-lb jugs of RL-17 left. Based on your kind concern I just emptied the jugs into the garden.

Thanks for keeping me safe.


P

 

[wildgene]

...yer wife is gonna be really surprized this summer when the cat goes outside to "use" the garden, & goes "BOOM!!!"...

 

[nvbroncrider]

That's funny!!

 

[FOTIS]

RL17 works great in the 348 win too!

 

[Anonymous]

If any of you fellows are afeared for your lives of RL17...I'll happily put it into permanent deep cold storage in permafrost to keep it out of circulation. My selfless contribution to society.

Remember...it's for the children.

 

[nvbroncrider]

I'll take it. I got a field that need fertilized.