Need a QL Calculation Please

5shot · Nov 30, 2018

Anyone out there bored and have time to do a QL Calc? I am actually looking at a reduced load for Bobcat, as many people in the various forums comment that full power 223 will blow a huge hole in a cat. Looking for a load in the 2200-2400fps range. I'm guessing 19-20 grn will get me there.

223 Rem
1:12 Twist
20" Tube
50gr Speer TNT & 55 Hornady SPSX
H4895

Thanks

5shot · Dec 1, 2018

Anyone?

DrMike · Dec 1, 2018

Getting velocities down that low will create other problems.

Code:

Cartridge          : .223 Rem. (SAAMI)
Bullet             : .224, 50, Speer HP TNT Green 1028
Useable Case Capaci: 27.317 grain H2O = 1.774 cm³
Cartridge O.A.L. L6: 2.260 inch = 57.40 mm
Barrel Length      : 20.0 inch = 508.0 mm
Powder             : Hodgdon H4895

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   96    24.12   2928     952   38316   7993     86.0    1.001
-09.0   97    24.39   2963     975   39658   8109     86.7    0.985
-08.0   98    24.66   2998     998   41043   8223     87.4    0.970
-07.0   99    24.92   3033    1021   42471   8335     88.0    0.955
-06.0  100    25.19   3068    1045   43949   8445     88.7    0.940
-05.0  101    25.46   3103    1069   45481   8553     89.3    0.926
-04.0  102    25.73   3138    1093   47070   8659     90.0    0.912  ! Near Maximum !
-03.0  103    26.00   3173    1118   48719   8763     90.6    0.898  ! Near Maximum !
-02.0  104    26.26   3208    1143   50431   8865     91.2    0.884  ! Near Maximum !
-01.0  105    26.53   3243    1168   52207   8964     91.7    0.870  ! Near Maximum !
+00.0  106    26.80   3279    1194   54052   9060     92.3    0.857  ! Near Maximum !
+01.0  107    27.07   3314    1219   55968   9154     92.8    0.844  !DANGEROUS LOAD-DO NOT USE!
+02.0  109    27.34   3350    1246   57958   9245     93.4    0.831  !DANGEROUS LOAD-DO NOT USE!
+03.0  110    27.60   3385    1272   60027   9333     93.9    0.819  !DANGEROUS LOAD-DO NOT USE!
+04.0  111    27.87   3421    1299   62177   9418     94.4    0.806  !DANGEROUS LOAD-DO NOT USE!
+05.0  112    28.14   3456    1326   64414   9499     94.8    0.794  !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    106    26.80   3470    1337   65040   9320     97.7    0.791  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba    106    26.80   3043    1028   43579   8412     83.7    0.943

Code:

Cartridge          : .223 Rem. (SAAMI)
Bullet             : .224, 55, Hornady SXSP 2260
Useable Case Capaci: 27.514 grain H2O = 1.786 cm³
Cartridge O.A.L. L6: 2.260 inch = 57.40 mm
Barrel Length      : 20.0 inch = 508.0 mm
Powder             : Hodgdon H4895

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   93    23.67   2830     978   38460   8200     87.8    1.038
-09.0   94    23.93   2862    1001   39750   8314     88.5    1.022
-08.0   95    24.20   2895    1024   41082   8427     89.1    1.006
-07.0   96    24.46   2928    1047   42466   8538     89.7    0.991
-06.0   97    24.72   2961    1071   43897   8647     90.3    0.976
-05.0   99    24.99   2994    1095   45377   8754     90.9    0.962
-04.0  100    25.25   3027    1119   46911   8859     91.5    0.947  ! Near Maximum !
-03.0  101    25.51   3060    1144   48499   8961     92.1    0.933  ! Near Maximum !
-02.0  102    25.77   3093    1168   50144   9061     92.6    0.919  ! Near Maximum !
-01.0  103    26.04   3126    1194   51848   9158     93.1    0.906  ! Near Maximum !
+00.0  104    26.30   3159    1219   53613   9253     93.6    0.892  ! Near Maximum !
+01.0  105    26.56   3193    1245   55444   9345     94.1    0.879  !DANGEROUS LOAD-DO NOT USE!
+02.0  106    26.83   3226    1271   57341   9434     94.6    0.866  !DANGEROUS LOAD-DO NOT USE!
+03.0  107    27.09   3259    1297   59308   9520     95.0    0.853  !DANGEROUS LOAD-DO NOT USE!
+04.0  108    27.35   3292    1324   61349   9603     95.5    0.841  !DANGEROUS LOAD-DO NOT USE!
+05.0  109    27.62   3325    1350   63466   9683     95.9    0.828  !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    104    26.30   3336    1359   64277   9444     98.5    0.824  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba    104    26.30   2939    1055   43398   8657     85.4    0.980

5shot · Dec 1, 2018

According to Hodgdon you can take H4895 and reduce loads by 40% for low velocity/recoil. I'm going to give it a try, since we have located a big tom bobcat and don't want to ruin the hide.

5shot · Dec 1, 2018

Thanks for the info DrMike

Tjay · Dec 1, 2018

Speer manual has 12gr. of aa5744 doing a little over 2000 with 50gr. bullet and the 55gr. bullets.

frankm · Dec 1, 2018

Been a few years since loading any reduced H4895 loads but I think if you load around 65-70% of the full power data you should be around 2450-2500 Fps. A slightly tougher bullet than the Hor SX or Speer TNT might be another good idea for saving the hide.

Good luck

5shot · Dec 1, 2018

Tjay":36qbzrqa said:
Speer manual has 12gr. of aa5744 doing a little over 2000 with 50gr. bullet and the 55gr. bullets.

I had the H4895, and even at the reduced load, you can't double charge a case, so I would prefer to go with it.

frankm":36qbzrqa said:
Been a few years since loading any reduced H4895 loads but I think if you load around 65-70% of the full power data you should be around 2450-2500 Fps. A slightly tougher bullet than the Hor SX or Speer TNT might be another good idea for saving the hide.

Good luck

I thought about the tougher bullet, but I am hoping for no exit, as every one I have seen with an exit has a huge hole.

wvbuckbuster · Dec 1, 2018

Was looking for a reduced load for turkey. Used H4895 came up with 20grs powder 55 gr Sierra spt Haven't checked the speed but shot a coon at 20 yds and the exit hole was about the size of a dime. If I was saving the hide as you want to this would have worked I think. Group size at 100yds. was 5/8 in out of a 22 in Ruger American. Dan.

5shot · Dec 1, 2018

wvbuckbuster":2myhs9go said:
Was looking for a reduced load for turkey. Used H4895 came up with 20grs powder 55 gr Sierra spt Haven't checked the speed but shot a coon at 20 yds and the exit hole was about the size of a dime. If I was saving the hide as you want to this would have worked I think. Group size at 100yds. was 5/8 in out of a 22 in Ruger American. Dan.

Thanks! We will be hunting in dense forest (pine/fur), so hits will be close. If it didn't blow the coon apart I should be good. Appreciate it.