221 Fireball QL

[frankm]

Would someone be kind enough to run a QL prediction with the following components. Wanting to play with some reduced ground squirrel loads in 221 FB. I ve shot them for years in 223 with great accuracy and performance.
Thx in advance.

221 Fireball
24” barrel
40 grain and 50 grain BT
1.875 oal
Blue Dot powder

 

[DrMike]

Cartridge          : .221 Rem Fireball
Bullet             : .224, 40, Nosler BalTip 39510
Useable Case Capaci: 19.783 grain H2O = 1.284 cm³
Cartridge O.A.L. L6: 1.875 inch = 47.63 mm
Barrel Length      : 24.0 inch = 609.6 mm
Powder             : Alliant BLUE DOT

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   74    10.98   2945     770   35752   3383    100.0    1.056
-09.0   75    11.10   2966     781   36621   3405    100.0    1.046
-08.0   76    11.22   2987     792   37505   3428    100.0    1.036
-07.0   76    11.35   3008     804   38405   3450    100.0    1.025
-06.0   77    11.47   3029     815   39320   3472    100.0    1.015
-05.0   78    11.59   3049     826   40252   3495    100.0    1.005  ! Near Maximum !
-04.0   79    11.71   3069     837   41200   3517    100.0    0.995  ! Near Maximum !
-03.0   80    11.83   3090     848   42164   3539    100.0    0.986  ! Near Maximum !
-02.0   81    11.96   3110     859   43145   3560    100.0    0.976  ! Near Maximum !
-01.0   81    12.08   3130     870   44144   3582    100.0    0.967  ! Near Maximum !
+00.0   82    12.20   3149     881   45160   3604    100.0    0.958  ! Near Maximum !
+01.0   83    12.32   3169     892   46194   3625    100.0    0.949  !DANGEROUS LOAD-DO NOT USE!
+02.0   84    12.44   3189     903   47245   3646    100.0    0.941  !DANGEROUS LOAD-DO NOT USE!
+03.0   85    12.57   3208     914   48315   3668    100.0    0.932  !DANGEROUS LOAD-DO NOT USE!
+04.0   85    12.69   3227     925   49404   3689    100.0    0.924  !DANGEROUS LOAD-DO NOT USE!
+05.0   86    12.81   3246     936   50511   3710    100.0    0.916  !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     82    12.20   3203     911   51006   3519    100.0    0.917  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba     82    12.20   3070     837   39168   3728    100.0    1.013

Cartridge          : .221 Rem Fireball
Bullet             : .224, 50, Nosler BalTip 39522
Useable Case Capaci: 18.837 grain H2O = 1.223 cm³
Cartridge O.A.L. L6: 1.875 inch = 47.63 mm
Barrel Length      : 24.0 inch = 609.6 mm
Powder             : Alliant BLUE DOT

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   71    10.08   2617     760   36268   3147    100.0    1.168
-09.0   72    10.19   2635     771   37123   3170    100.0    1.157
-08.0   73    10.30   2654     782   37993   3193    100.0    1.146
-07.0   74    10.42   2672     792   38876   3216    100.0    1.135
-06.0   74    10.53   2690     803   39775   3239    100.0    1.124  ! Near Maximum !
-05.0   75    10.64   2707     814   40688   3262    100.0    1.113  ! Near Maximum !
-04.0   76    10.75   2725     824   41616   3285    100.0    1.103  ! Near Maximum !
-03.0   77    10.86   2743     835   42559   3307    100.0    1.092  ! Near Maximum !
-02.0   78    10.98   2760     846   43518   3330    100.0    1.082  ! Near Maximum !
-01.0   78    11.09   2777     856   44492   3352    100.0    1.072  ! Near Maximum !
+00.0   79    11.20   2795     867   45482   3375    100.0    1.063  ! Near Maximum !
+01.0   80    11.31   2812     878   46489   3397    100.0    1.053  !DANGEROUS LOAD-DO NOT USE!
+02.0   81    11.42   2829     888   47512   3419    100.0    1.044  !DANGEROUS LOAD-DO NOT USE!
+03.0   82    11.54   2846     899   48551   3441    100.0    1.035  !DANGEROUS LOAD-DO NOT USE!
+04.0   82    11.65   2863     910   49607   3463    100.0    1.026  !DANGEROUS LOAD-DO NOT USE!
+05.0   83    11.76   2879     920   50681   3485    100.0    1.017  !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     79    11.20   2835     892   51154   3304    100.0    1.021  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba     79    11.20   2735     831   39617   3477    100.0    1.119  ! Near Maximum !

 

[frankm]

Thank you Dr Mike!

 

[lhsako]

What rifle is the fireball chambered in?

 

[frankm]

Not many production rifles. Rem did a couple different runs in 700. In 2002 they did the classic, ran some 700 s in the LS ( laminated stock) model for a year or so. Cooper did some for a while as well as CZ but not a ton around.

It’s a great little cartridge in a rifle and with a 40 grain bullet does give up much to 223. It performs right with a 222 Rem due to it being loaded to higher pressure in factory ammo.

 

[lhsako]

I agree. Would like to have one in the Rem. XP100.