7-08 QL Request - Cutting Barrel Down From 22" to 18" - Adding Suppressor

Orezona

Orezona

Beginner
Jan 23, 2020
72
63
I've been very happy with my 22" Bergara B14 Hunter, 7-08, 1:9.5. Current load is Lapua Brass, BR2 primer, 39.0 of IMR 8208 XBR, 162 ELD-X. Current accurate speed is 2653. I'm cutting it down to 18" and adding a Banish 30 V2 suppressor. I've never requested a QL so please let me know if I"m missing necessary information.


Thank you in advance.
 
That’s what I’ve read but I sure would like to see QL data for the components I’m using. Mostly curiosity.
 
Code: 
Cartridge          : 7 mm-08 Rem.
Bullet             : .284, 162, Hornady ELD-X 2840 G7
Useable Case Capaci: 44.629 grain H2O = 2.898 cm³
Cartridge O.A.L. L6: 2.800 inch = 71.12 mm
Barrel Length      : 22.0 inch = 558.8 mm
Powder             : IMR 8208 XBR

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   85    35.10   2422    2110   48982   7780     99.7    1.265
-09.0   86    35.49   2445    2150   50442   7837     99.8    1.248
-08.0   87    35.88   2467    2189   51942   7891     99.9    1.232  ! Near Maximum !
-07.0   88    36.27   2489    2229   53484   7942    100.0    1.216  ! Near Maximum !
-06.0   89    36.66   2512    2269   55070   7990    100.0    1.200  ! Near Maximum !
-05.0   90    37.05   2534    2309   56699   8036    100.0    1.184  ! Near Maximum !
-04.0   91    37.44   2556    2349   58375   8079    100.0    1.169  ! Near Maximum !
-03.0   92    37.83   2577    2390   60098   8123    100.0    1.155  !DANGEROUS LOAD-DO NOT USE!
-02.0   93    38.22   2599    2430   61869   8165    100.0    1.140  !DANGEROUS LOAD-DO NOT USE!
-01.0   94    38.61   2621    2471   63691   8207    100.0    1.125  !DANGEROUS LOAD-DO NOT USE!
+00.0   95    39.00   2642    2511   65566   8249    100.0    1.111  !DANGEROUS LOAD-DO NOT USE!
+01.0   96    39.39   2664    2552   67494   8290    100.0    1.098  !DANGEROUS LOAD-DO NOT USE!
+02.0   97    39.78   2685    2593   69478   8331    100.0    1.084  !DANGEROUS LOAD-DO NOT USE!
+03.0   98    40.17   2706    2635   71520   8371    100.0    1.071  !DANGEROUS LOAD-DO NOT USE!
+04.0   99    40.56   2728    2676   73622   8411    100.0    1.058  !DANGEROUS LOAD-DO NOT USE!
+05.0  100    40.95   2749    2717   75786   8450    100.0    1.045  !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     95    39.00   2681    2586   70881   8096    100.0    1.078  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba     95    39.00   2594    2421   60248   8428     99.9    1.151  !DANGEROUS LOAD-DO NOT USE!

Code: 
Cartridge          : 7 mm-08 Rem.
Bullet             : .284, 162, Hornady ELD-X 2840 G7
Useable Case Capaci: 44.629 grain H2O = 2.898 cm³
Cartridge O.A.L. L6: 2.800 inch = 71.12 mm
Barrel Length      : 18.0 inch = 457.2 mm
Powder             : IMR 8208 XBR

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   85    35.10   2315    1928   48982   9860     99.1    1.125
-09.0   86    35.49   2338    1966   50442   9948     99.3    1.109
-08.0   87    35.88   2360    2004   51942  10032     99.5    1.094  ! Near Maximum !
-07.0   88    36.27   2383    2043   53484  10112     99.6    1.079  ! Near Maximum !
-06.0   89    36.66   2405    2081   55070  10189     99.7    1.065  ! Near Maximum !
-05.0   90    37.05   2428    2120   56699  10263     99.8    1.050  ! Near Maximum !
-04.0   91    37.44   2450    2159   58375  10333     99.9    1.036  ! Near Maximum !
-03.0   92    37.83   2472    2198   60098  10399     99.9    1.023  !DANGEROUS LOAD-DO NOT USE!
-02.0   93    38.22   2494    2237   61869  10462    100.0    1.009  !DANGEROUS LOAD-DO NOT USE!
-01.0   94    38.61   2516    2277   63691  10522    100.0    0.996  !DANGEROUS LOAD-DO NOT USE!
+00.0   95    39.00   2538    2317   65566  10577    100.0    0.983  !DANGEROUS LOAD-DO NOT USE!
+01.0   96    39.39   2560    2357   67494  10632    100.0    0.970  !DANGEROUS LOAD-DO NOT USE!
+02.0   97    39.78   2581    2397   69478  10687    100.0    0.958  !DANGEROUS LOAD-DO NOT USE!
+03.0   98    40.17   2603    2437   71520  10740    100.0    0.945  !DANGEROUS LOAD-DO NOT USE!
+04.0   99    40.56   2624    2477   73622  10793    100.0    0.933  !DANGEROUS LOAD-DO NOT USE!
+05.0  100    40.95   2646    2518   75786  10846    100.0    0.921  !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     95    39.00   2580    2395   70881  10381    100.0    0.951  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba     95    39.00   2486    2223   60248  10741     99.6    1.020  !DANGEROUS LOAD-DO NOT USE!
 
DrMike said:
Code: 
Cartridge          : 7 mm-08 Rem.
Bullet             : .284, 162, Hornady ELD-X 2840 G7
Useable Case Capaci: 44.629 grain H2O = 2.898 cm³
Cartridge O.A.L. L6: 2.800 inch = 71.12 mm
Barrel Length      : 22.0 inch = 558.8 mm
Powder             : IMR 8208 XBR

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   85    35.10   2422    2110   48982   7780     99.7    1.265
-09.0   86    35.49   2445    2150   50442   7837     99.8    1.248
-08.0   87    35.88   2467    2189   51942   7891     99.9    1.232  ! Near Maximum !
-07.0   88    36.27   2489    2229   53484   7942    100.0    1.216  ! Near Maximum !
-06.0   89    36.66   2512    2269   55070   7990    100.0    1.200  ! Near Maximum !
-05.0   90    37.05   2534    2309   56699   8036    100.0    1.184  ! Near Maximum !
-04.0   91    37.44   2556    2349   58375   8079    100.0    1.169  ! Near Maximum !
-03.0   92    37.83   2577    2390   60098   8123    100.0    1.155  !DANGEROUS LOAD-DO NOT USE!
-02.0   93    38.22   2599    2430   61869   8165    100.0    1.140  !DANGEROUS LOAD-DO NOT USE!
-01.0   94    38.61   2621    2471   63691   8207    100.0    1.125  !DANGEROUS LOAD-DO NOT USE!
+00.0   95    39.00   2642    2511   65566   8249    100.0    1.111  !DANGEROUS LOAD-DO NOT USE!
+01.0   96    39.39   2664    2552   67494   8290    100.0    1.098  !DANGEROUS LOAD-DO NOT USE!
+02.0   97    39.78   2685    2593   69478   8331    100.0    1.084  !DANGEROUS LOAD-DO NOT USE!
+03.0   98    40.17   2706    2635   71520   8371    100.0    1.071  !DANGEROUS LOAD-DO NOT USE!
+04.0   99    40.56   2728    2676   73622   8411    100.0    1.058  !DANGEROUS LOAD-DO NOT USE!
+05.0  100    40.95   2749    2717   75786   8450    100.0    1.045  !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     95    39.00   2681    2586   70881   8096    100.0    1.078  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba     95    39.00   2594    2421   60248   8428     99.9    1.151  !DANGEROUS LOAD-DO NOT USE!

Code: 
Cartridge          : 7 mm-08 Rem.
Bullet             : .284, 162, Hornady ELD-X 2840 G7
Useable Case Capaci: 44.629 grain H2O = 2.898 cm³
Cartridge O.A.L. L6: 2.800 inch = 71.12 mm
Barrel Length      : 18.0 inch = 457.2 mm
Powder             : IMR 8208 XBR

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   85    35.10   2315    1928   48982   9860     99.1    1.125
-09.0   86    35.49   2338    1966   50442   9948     99.3    1.109
-08.0   87    35.88   2360    2004   51942  10032     99.5    1.094  ! Near Maximum !
-07.0   88    36.27   2383    2043   53484  10112     99.6    1.079  ! Near Maximum !
-06.0   89    36.66   2405    2081   55070  10189     99.7    1.065  ! Near Maximum !
-05.0   90    37.05   2428    2120   56699  10263     99.8    1.050  ! Near Maximum !
-04.0   91    37.44   2450    2159   58375  10333     99.9    1.036  ! Near Maximum !
-03.0   92    37.83   2472    2198   60098  10399     99.9    1.023  !DANGEROUS LOAD-DO NOT USE!
-02.0   93    38.22   2494    2237   61869  10462    100.0    1.009  !DANGEROUS LOAD-DO NOT USE!
-01.0   94    38.61   2516    2277   63691  10522    100.0    0.996  !DANGEROUS LOAD-DO NOT USE!
+00.0   95    39.00   2538    2317   65566  10577    100.0    0.983  !DANGEROUS LOAD-DO NOT USE!
+01.0   96    39.39   2560    2357   67494  10632    100.0    0.970  !DANGEROUS LOAD-DO NOT USE!
+02.0   97    39.78   2581    2397   69478  10687    100.0    0.958  !DANGEROUS LOAD-DO NOT USE!
+03.0   98    40.17   2603    2437   71520  10740    100.0    0.945  !DANGEROUS LOAD-DO NOT USE!
+04.0   99    40.56   2624    2477   73622  10793    100.0    0.933  !DANGEROUS LOAD-DO NOT USE!
+05.0  100    40.95   2646    2518   75786  10846    100.0    0.921  !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     95    39.00   2580    2395   70881  10381    100.0    0.951  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba     95    39.00   2486    2223   60248  10741     99.6    1.020  !DANGEROUS LOAD-DO NOT USE!
Click to expand...
Thank you Sir very much.
 
Last edited:
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