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

Orezona · Aug 6, 2026

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.

Wis65x55 · Aug 6, 2026

Will likely get a loss of around 100 fps.

Orezona · Aug 6, 2026

That’s what I’ve read but I sure would like to see QL data for the components I’m using. Mostly curiosity.

DrMike · Aug 6, 2026

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!

Orezona · Aug 6, 2026

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!

Thank you Sir very much.

Orezona · Friday at 11:29 AM

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!

Would you mind changing the seating depth to 2.755 C.O.A.L. ? My 2.755 is 2.086 C.B.T.O.

Thank you again in advance.

DrMike · Friday at 1:55 PM

Code:

Cartridge          : 7 mm-08 Rem.
Bullet             : .284, 162, Hornady ELD-X 2840 G7
Useable Case Capaci: 43.909 grain H2O = 2.851 cm³
Cartridge O.A.L. L6: 2.755 inch = 69.98 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   87    35.10   2332    1956   50406   9809     99.2    1.110
-09.0   88    35.49   2355    1994   51929   9893     99.4    1.095  ! Near Maximum !
-08.0   89    35.88   2377    2033   53495   9974     99.5    1.080  ! Near Maximum !
-07.0   90    36.27   2400    2072   55105  10051     99.7    1.065  ! Near Maximum !
-06.0   91    36.66   2423    2111   56762  10125     99.8    1.051  ! Near Maximum !
-05.0   92    37.05   2445    2150   58466  10195     99.9    1.037  ! Near Maximum !
-04.0   92    37.44   2467    2190   60220  10262     99.9    1.023  !DANGEROUS LOAD-DO NOT USE!
-03.0   93    37.83   2490    2230   62024  10325    100.0    1.009  !DANGEROUS LOAD-DO NOT USE!
-02.0   94    38.22   2512    2270   63880  10384    100.0    0.996  !DANGEROUS LOAD-DO NOT USE!
-01.0   95    38.61   2534    2310   65791  10440    100.0    0.983  !DANGEROUS LOAD-DO NOT USE!
+00.0   96    39.00   2556    2350   67759  10494    100.0    0.970  !DANGEROUS LOAD-DO NOT USE!
+01.0   97    39.39   2578    2391   69784  10547    100.0    0.957  !DANGEROUS LOAD-DO NOT USE!
+02.0   98    39.78   2600    2431   71870  10600    100.0    0.945  !DANGEROUS LOAD-DO NOT USE!
+03.0   99    40.17   2622    2472   74018  10652    100.0    0.932  !DANGEROUS LOAD-DO NOT USE!
+04.0  100    40.56   2643    2513   76231  10703    100.0    0.920  !DANGEROUS LOAD-DO NOT USE!
+05.0  101    40.95   2665    2554   78511  10754    100.0    0.909  !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     96    39.00   2598    2428   73270  10299    100.0    0.939  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba     96    39.00   2505    2256   62244  10671     99.6    1.006  !DANGEROUS LOAD-DO NOT USE!

Orezona · Friday at 6:01 PM

Thank you Sir. I was interested in the pressure. I'm excited to get this barrel back.

Orezona · 2026-08-12T19:15:15-0700

Would you mind changing the seating depth one last time to 2.810 C.O.A.L.? I'm trying not to completely depend on "signs" of pressure.

Thank you again in advance.

DrMike · 2026-08-12T19:36:08-0700

Code:

Cartridge          : 7 mm-08 Rem.
Bullet             : .284, 162, Hornady ELD-X 2840 G7
Useable Case Capaci: 44.790 grain H2O = 2.908 cm³
Cartridge O.A.L. L6: 2.810 inch = 71.37 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   2311    1922   48669   9871     99.1    1.128
-09.0   86    35.49   2334    1960   50116   9959     99.3    1.112
-08.0   87    35.88   2357    1998   51602  10044     99.4    1.097  ! Near Maximum !
-07.0   88    36.27   2379    2036   53129  10125     99.6    1.082  ! Near Maximum !
-06.0   89    36.66   2401    2074   54699  10203     99.7    1.068  ! Near Maximum !
-05.0   90    37.05   2424    2113   56313  10277     99.8    1.053  ! Near Maximum !
-04.0   91    37.44   2446    2152   57972  10348     99.9    1.039  ! Near Maximum !
-03.0   92    37.83   2468    2191   59677  10415     99.9    1.026  !DANGEROUS LOAD-DO NOT USE!
-02.0   93    38.22   2490    2230   61430  10479    100.0    1.012  !DANGEROUS LOAD-DO NOT USE!
-01.0   94    38.61   2512    2270   63234  10539    100.0    0.999  !DANGEROUS LOAD-DO NOT USE!
+00.0   94    39.00   2534    2309   65088  10595    100.0    0.986  !DANGEROUS LOAD-DO NOT USE!
+01.0   95    39.39   2556    2349   66995  10651    100.0    0.973  !DANGEROUS LOAD-DO NOT USE!
+02.0   96    39.78   2577    2389   68958  10705    100.0    0.961  !DANGEROUS LOAD-DO NOT USE!
+03.0   97    40.17   2599    2429   70977  10759    100.0    0.948  !DANGEROUS LOAD-DO NOT USE!
+04.0   98    40.56   2620    2469   73055  10813    100.0    0.936  !DANGEROUS LOAD-DO NOT USE!
+05.0   99    40.95   2641    2510   75194  10865    100.0    0.924  !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     94    39.00   2576    2387   70361  10399    100.0    0.954  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba     94    39.00   2482    2215   59813  10755     99.5    1.023  !DANGEROUS LOAD-DO NOT USE!

As an aside, you will note that 39.0 grains of IMR 8208 XBR is right at 65K PSI, which is where most of my cartridges peak in any case. It does not appear to be an excessive pressure.

Orezona · 2026-08-13T07:59:31-0700

DrMike said:

Code:

Cartridge          : 7 mm-08 Rem.
Bullet             : .284, 162, Hornady ELD-X 2840 G7
Useable Case Capaci: 44.790 grain H2O = 2.908 cm³
Cartridge O.A.L. L6: 2.810 inch = 71.37 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   2311    1922   48669   9871     99.1    1.128
-09.0   86    35.49   2334    1960   50116   9959     99.3    1.112
-08.0   87    35.88   2357    1998   51602  10044     99.4    1.097  ! Near Maximum !
-07.0   88    36.27   2379    2036   53129  10125     99.6    1.082  ! Near Maximum !
-06.0   89    36.66   2401    2074   54699  10203     99.7    1.068  ! Near Maximum !
-05.0   90    37.05   2424    2113   56313  10277     99.8    1.053  ! Near Maximum !
-04.0   91    37.44   2446    2152   57972  10348     99.9    1.039  ! Near Maximum !
-03.0   92    37.83   2468    2191   59677  10415     99.9    1.026  !DANGEROUS LOAD-DO NOT USE!
-02.0   93    38.22   2490    2230   61430  10479    100.0    1.012  !DANGEROUS LOAD-DO NOT USE!
-01.0   94    38.61   2512    2270   63234  10539    100.0    0.999  !DANGEROUS LOAD-DO NOT USE!
+00.0   94    39.00   2534    2309   65088  10595    100.0    0.986  !DANGEROUS LOAD-DO NOT USE!
+01.0   95    39.39   2556    2349   66995  10651    100.0    0.973  !DANGEROUS LOAD-DO NOT USE!
+02.0   96    39.78   2577    2389   68958  10705    100.0    0.961  !DANGEROUS LOAD-DO NOT USE!
+03.0   97    40.17   2599    2429   70977  10759    100.0    0.948  !DANGEROUS LOAD-DO NOT USE!
+04.0   98    40.56   2620    2469   73055  10813    100.0    0.936  !DANGEROUS LOAD-DO NOT USE!
+05.0   99    40.95   2641    2510   75194  10865    100.0    0.924  !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     94    39.00   2576    2387   70361  10399    100.0    0.954  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba     94    39.00   2482    2215   59813  10755     99.5    1.023  !DANGEROUS LOAD-DO NOT USE!

As an aside, you will note that 39.0 grains of IMR 8208 XBR is right at 65K PSI, which is where most of my cartridges peak in any case. It does not appear to be an excessive pressure.

Thank you for the QL and your personal experience with pressure. When I developed this load, I saw an ejector swipe @ 39.2 or 39.3 and backed down to 39.0. It is accurate and the SD is 4.7

Thank you again Sir.