QL request 280 Rem Scirocco II's

[hunter24605]

I'm wanting to experiment with Swift Scirocco II's over the winter and hoping one of you fine gentlemen will provide some QL info...

280 Rem.
150 Gr Swift Scirocco II
CCI 200
22" barrel

Powders I have on hand, but open to any powder recommendation, are:
RL-19, RL-22, Superformance, 4831, and Norma MRP

Thanks!!!

 

[DrMike]

Cartridge : .280 Rem.
Bullet : .284, 150, Swift Scirocco
Useable Case Capaci: 58.708 grain H2O = 3.812 cm³
Cartridge O.A.L. L6: 3.330 inch = 84.58 mm
Barrel Length : 22.0 inch = 558.8 mm
Powder : Alliant Reloder-19

Predicted data by increasing and decreasing the given charge,
incremented in steps of 2.0% 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

-20.0   82    44.40   2273    1721   30309   9277     86.2    1.478
-18.0   84    45.51   2330    1809   32292   9604     87.5    1.440
-16.0   86    46.62   2388    1900   34406   9924     88.9    1.402
-14.0   88    47.73   2446    1993   36663  10238     90.1    1.365
-12.0   90    48.84   2504    2089   39073  10544     91.3    1.329
-10.0   92    49.95   2563    2188   41646  10841     92.5    1.290
-08.0   94    51.06   2621    2289   44396  11127     93.5    1.252
-06.0   96    52.17   2680    2393   47337  11401     94.5    1.214
-04.0   98    53.28   2739    2499   50486  11663     95.4    1.179  ! Near Maximum !
-02.0  100    54.39   2798    2608   53860  11910     96.3    1.144  ! Near Maximum !
+00.0  103    55.50   2857    2719   57479  12143     97.0    1.110  ! Near Maximum !
+02.0  105    56.61   2916    2833   61363  12359     97.7    1.078  !DANGEROUS LOAD-DO NOT USE!
+04.0  107    57.72   2975    2949   65537  12557     98.3    1.046  !DANGEROUS LOAD-DO NOT USE!
+06.0  109    58.83   3034    3067   70001  12737     98.8    1.016  !DANGEROUS LOAD-DO NOT USE!
+08.0  111    59.94   3093    3187   74784  12896     99.2    0.986  !DANGEROUS LOAD-DO NOT USE!
+10.0  113    61.05   3152    3310   79933  13035     99.6    0.958  !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 103 55.50 3000 2998 68793 12094 99.9 1.028 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 103 55.50 2671 2376 46996 11579 90.1 1.215

Cartridge : .280 Rem.
Bullet : .284, 150, Swift Scirocco
Useable Case Capaci: 58.708 grain H2O = 3.812 cm³
Cartridge O.A.L. L6: 3.330 inch = 84.58 mm
Barrel Length : 22.0 inch = 558.8 mm

Predicted Data for Indicated Charges of the Following Powders.
Matching Maximum Pressure: 58000 psi, or 399 MPa
or a maximum loading ratio or filling of 110 %
These calculations refer to your specified settings in QuickLOAD 'Cartridge Dimensions' window.
C A U T I O N : any load listed can result in a powder charge that falls below minimum suggested
loads or exceeds maximum suggested loads as presented in current handloading manuals. Understand
that all of the listed powders can be unsuitable for the given combination of cartridge, bullet
and gun. Actual load order can vary, depending upon lot-to-lot powder and component variations.
USE ONLY FOR COMPARISON !

8 loads produced a Loading Ratio below user-defined minimum of 90%. These powders have been skipped.

Powder type          Filling/Loading Ratio  Charge    Charge   Vel. Prop.Burnt P max  P muzz  B_Time
                                      %     Grains    Gramm   fps     %       psi     psi    ms
---------------------------------  -----------------------------------------------------------------
Alliant Reloder-26                 104.2     60.6     3.93    2984    99.9    58000   13290   1.101  ! Near Maximum !
Norma MRP                          104.7     59.1     3.83    2947    98.5    58000   13190   1.101  ! Near Maximum !
Vihtavuori N560                    106.3     58.8     3.81    2927    95.3    58000   13214   1.100  ! Near Maximum !
Accurate MAGPRO                    106.7     61.4     3.98    2915    93.6    58000   13211   1.105  ! Near Maximum !
Alliant Reloder-22                 106.6     58.3     3.78    2912    97.3    58000   12847   1.104  ! Near Maximum !
Winchester WXR                     109.4     58.6     3.80    2911    97.1    58000   12850   1.105  ! Near Maximum !
Alliant Reloder-17                  93.7     53.2     3.45    2907   100.0    58000   11755   1.103  ! Near Maximum !
Alliant Reloder-23                 109.5     58.0     3.76    2907   100.0    58000   11899   1.107  ! Near Maximum !
IMR 7828 SSC                       104.6     58.2     3.77    2906    95.6    58000   12786   1.093  ! Near Maximum !
IMR 7828                           110.0     57.8     3.75    2889    95.4    56926   12719   1.103  ! Near Maximum !
Ramshot Magnum                     106.2     62.6     4.06    2887    97.8    58000   12339   1.097  ! Near Maximum !
Ramshot Hunter                      98.3     55.0     3.56    2868    99.1    58000   11965   1.111  ! Near Maximum !
Alliant Reloder-25                 110.0     59.2     3.84    2867    99.2    53102   12679   1.140  ! Near Maximum !
Alliant Reloder-19                 102.8     55.7     3.61    2865    97.1    58000   12174   1.106  ! Near Maximum !
Hodgdon H414                        92.8     53.1     3.44    2862    98.6    58000   11944   1.114  ! Near Maximum !
Winchester 760                      92.8     53.1     3.44    2862    98.6    58000   11944   1.114  ! Near Maximum !
Norma URP                           97.8     52.4     3.39    2852    99.8    58000   11534   1.119  ! Near Maximum !
Vihtavuori N550                     94.9     52.5     3.40    2850    99.8    58000   11651   1.124  ! Near Maximum !
Accurate 4350                       97.2     52.6     3.41    2849    99.9    58000   11539   1.136  ! Near Maximum !
Norma 204                           97.4     54.4     3.53    2840    96.8    58000   11827   1.107  ! Near Maximum !
IMR 4831                           102.7     53.2     3.45    2836    99.9    58000   11307   1.127  ! Near Maximum !
Hodgdon H4831 SC                   104.0     56.9     3.69    2833    94.8    58000   11861   1.103  ! Near Maximum !
Hodgdon H4831                      108.2     56.9     3.69    2833    94.8    58000   11861   1.103  ! Near Maximum !
Accurate 3100                      106.6     57.7     3.74    2828    99.1    58000   11524   1.137  ! Near Maximum !
Hodgdon Hybrid 100V                100.5     52.6     3.41    2820   100.0    58000   10659   1.117  ! Near Maximum !
Winchester Supreme 780             101.5     57.9     3.75    2820    96.9    58000   11556   1.109  ! Near Maximum !
Vihtavuori N165                    108.5     58.1     3.76    2818    97.6    58000   11419   1.114  ! Near Maximum !
Hodgdon H380                        90.1     49.8     3.23    2807    99.7    58000   11081   1.129  ! Near Maximum !
Norma 203 old                       90.5     49.5     3.21    2803   100.0    58000   10694   1.140  ! Near Maximum !
Vihtavuori N160                    108.1     56.1     3.64    2791    95.6    58000   11255   1.113  ! Near Maximum !
IMR 4007 SSC                        91.9     50.4     3.27    2783    98.0    58000   11058   1.125  ! Near Maximum !

 

[SJB358]

I'd bet the 19, 22, MRP and 4831 would all do excellent. My thoughts would be to load up a few samples of the powders .050" off the lands and see what happens. Awesome bullet. After what I've seen with it this fall I think I'll be using it more.

Post up how you make out?

 

[DrMike]

I do know that the Scirocco appears to yield better accuracy with a pronounced jump to the lands. I normally allow 0.100 inches, just as I do for the AccuBond. It is a great bullet.

 

[hunter24605]

Thanks! That gives me plenty to roll around in my noodle and get me started!

 

[hunter24605]

Ill post up some results when I can get to the range..I have high hopes for MRP.

Mike, can you run the data for superformance? I has been excellent in my 140 AccuBond loads..But I suspect it may fizzle with heavier bullets.

 

[DrMike]

Unfortunately, Superformance isn't in the data base.

 

[hunter24605]

I think we have a winner! 57.7 gr of RL-22 has performed excellent! I started getting a little bit of a sticky bolt at 58 grain so backed off to 57.7 and seated them .065 off the lands..Yielded a 6 shot group measuring .75" @ 100 yards with an average speed of 2909. Ill take that from a 150 grain any day.

 

[DrMike]

Well, that sure looks like a winner. Great velocity, as well.

 

[gerry]

I think we have a winner! 57.7 gr of RL-22 has performed excellent! I started getting a little bit of a sticky bolt at 58 grain so backed off to 57.7 and seated them .065 off the lands..Yielded a 6 shot group measuring .75" @ 100 yards with an average speed of 2909. Ill take that from a 150 grain any day.

Load development complete The Scirocco is one of the best bullets out there.

 

[SJB358]

I think we have a winner! 57.7 gr of RL-22 has performed excellent! I started getting a little bit of a sticky bolt at 58 grain so backed off to 57.7 and seated them .065 off the lands..Yielded a 6 shot group measuring .75" @ 100 yards with an average speed of 2909. Ill take that from a 150 grain any day.

Wow, very nice. That 150 Swift is a wicked bullet. I'd run that sucker without worries. It's very impressive on animals.

 

[hunter24605]

I think we have a winner! 57.7 gr of RL-22 has performed excellent! I started getting a little bit of a sticky bolt at 58 grain so backed off to 57.7 and seated them .065 off the lands..Yielded a 6 shot group measuring .75" @ 100 yards with an average speed of 2909. Ill take that from a 150 grain any day.

Wow, very nice. That 150 Swift is a wicked bullet. I'd run that sucker without worries. It's very impressive on animals.

I have high hopes for it...No doubt it will serve me well on deer and black bear....Probably way more bullet than I need for deer and could go with a cheaper bullet, but for only $0.62 per trigger pull, that's a very cheap insurance policy that my deer/bear will go down. (if I do my part lol)

 

[SJB358]

I think we have a winner! 57.7 gr of RL-22 has performed excellent! I started getting a little bit of a sticky bolt at 58 grain so backed off to 57.7 and seated them .065 off the lands..Yielded a 6 shot group measuring .75" @ 100 yards with an average speed of 2909. Ill take that from a 150 grain any day.

Wow, very nice. That 150 Swift is a wicked bullet. I'd run that sucker without worries. It's very impressive on animals.

I have high hopes for it...No doubt it will serve me well on deer and black bear....Probably way more bullet than I need for deer and could go with a cheaper bullet, but for only $0.62 per trigger pull, that's a very cheap insurance policy that my deer/bear will go down. (if I do my part lol)

That is the best mindset of all. Unless you are shooting 100's of them, you'll be happier to have a quality bullet in your rifle, if only for deer as well. They will work excellent.