243 Load data

[FunkeyMonkey]

Can someone help me with 243 load data? I used to reload in late 80s and haven't since. Wanting to get back in now. I still have all my equipment. I noticed some of the powder max in my older books are different than what is online from manufacturers and they don't even list my old Hercules Reloder 12 powder. Could someone provide the Quickload recipes for the different powders what it calculates is max? Then I can work my way up.

Weatherby 243 win
24 in barrel
1 in 10 twist
100 gr Sierra Pro-hunter 1540
OAL 2.65

I have IMR4350, IMR4831, and R12 but interested in other powders as well. If someone has a petload 243 100gr, I would like to hear it as well.

[JackEllis]

I'm trying to develop a load for Remington 100 grain PSPCLs using IMR 4064 but until all the snow we have up here melts, I'm not going to get much range time in.

[Desertdoc]

Look at Hodgdon's website. Tons of data there for IMR powders.

[mulyhuntr]

I've had great results with 39gr of h4350 and 100gr sierra or hornady btsp's at 2.650". 3/4" groups at 100 from tikka t3 lite stainless and drop mule deer really nicely. I played with seating depths and didn't see much change in group size.

If I were you, I'd work up a load with your imr4350 as it should be pretty similar to h4350

[kevins750]

Can someone help me with 243 load data? I used to reload in late 80s and haven't since. Wanting to get back in now. I still have all my equipment. I noticed some of the powder max in my older books are different than what is online from manufacturers and they don't even list my old Hercules Reloder 12 powder. Could someone provide the Quickload recipes for the different powders what it calculates is max? Then I can work my way up.

Weatherby 243 win
24 in barrel
1 in 10 twist
100 gr Sierra Pro-hunter 1540
OAL 2.65

I have IMR4350, IMR4831, and R12 but interested in other powders as well. If someone has a petload 243 100gr, I would like to hear it as well.

Does that 100 grain bullet in that twist group well?

[WMG]

I currently hand load 2 243's and soon be to a 3rd.
I use Win 760 under a Speer 100gr BTSP.
We have taken a few deer including some nice bucks and the bullet seems to be better than I had expected.
I used to use Reloder 12 for the 30-30 til it went out of production which then led me to Reloder 15

[ar15barrels]

243 win
24 in barrel
100 gr Sierra Pro-hunter 1540
OAL 2.65

I have IMR4350, IMR4831, and R12 but interested in other powders as well. If someone has a petload 243 100gr, I would like to hear it as well.

Cartridge          : .243 Win.
Bullet             : .243, 100, Sierra SP 1540
Useable Case Capaci: 48.913 grain H2O = 3.176 cm³
Cartridge O.A.L. L6: 2.650 inch = 67.31 mm
Barrel Length      : 24.0 inch = 609.6 mm

Predicted Data for Indicated Charges of the Following Powders.
Matching Maximum Pressure: 55000 psi, or 379 MPa
or a maximum loading ratio or filling of 100 %
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 !

91 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                  97.9     47.5     3.07    3087   100.0    55000   11779   1.208  ! Near Maximum !
Vihtavuori N560                    100.0     46.1     2.99    3040    96.7    54692   11960   1.203  ! Near Maximum !
IMR 7828 SSC                        98.9     45.8     2.97    3033    97.2    55000   11631   1.190  ! Near Maximum !
Alliant Reloder-22                 100.0     45.6     2.95    3013    98.3    54290   11555   1.213  ! Near Maximum !
Accurate MAGPRO                    100.0     47.9     3.11    3012    95.0    53958   11921   1.220  ! Near Maximum !
Ramshot Magnum                     100.0     49.1     3.18    2985    98.8    53766   11086   1.213  ! Near Maximum !
Alliant Reloder-19                  97.0     43.7     2.83    2983    98.2    55000   11026   1.203  ! Near Maximum !
Ramshot Hunter                      92.6     43.1     2.80    2983    99.7    55000   10765   1.209  ! Near Maximum !
Accurate 4350                       91.6     41.3     2.68    2964   100.0    55000   10366   1.234  ! Near Maximum !
Hodgdon H4831 SC                    98.4     44.8     2.91    2956    96.3    55000   10819   1.200  ! Near Maximum !
IMR 4831                            96.7     41.8     2.71    2949   100.0    55000   10143   1.224  ! Near Maximum !
Winchester Supreme 780              96.0     45.6     2.96    2936    98.1    55000   10483   1.209  ! Near Maximum !
Hodgdon Hybrid 100V                 94.7     41.3     2.68    2931   100.0    55000    9570   1.213  ! Near Maximum !
Winchester WXR                     100.0     44.6     2.89    2930    97.2    49693   11306   1.263
Alliant Reloder-23                 100.0     44.1     2.86    2927   100.0    49785   10476   1.266
Hodgdon H4350                       94.4     41.6     2.70    2926    98.8    55000   10202   1.206  ! Near Maximum !
IMR 4350                            92.6     41.5     2.69    2926    98.9    55000   10185   1.206  ! Near Maximum !
Accurate 3100                      100.0     45.1     2.92    2921    99.6    53934   10326   1.252  ! Near Maximum !
IMR 7828                           100.0     43.8     2.84    2890    95.1    47345   11159   1.275
Hodgdon H4831                      100.0     43.8     2.84    2886    95.3    50933   10585   1.242
Alliant Reloder-25                 100.0     44.8     2.91    2870    99.2    44612   11101   1.316

I would personally try 42gr of 4831 to start.

Cartridge          : .243 Win.
Bullet             : .243, 100, Sierra SP 1540
Useable Case Capaci: 48.913 grain H2O = 3.176 cm³
Cartridge O.A.L. L6: 2.650 inch = 67.31 mm
Barrel Length      : 24.0 inch = 609.6 mm
Powder             : IMR 4831

Predicted data by increasing and decreasing the given charge,
incremented in steps of 0.235% 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

-02.4   96    41.50   2932    1909   53906  10116    100.0    1.236  ! Near Maximum !
-02.1   96    41.60   2938    1917   54302  10126    100.0    1.231  ! Near Maximum !
-01.9   97    41.70   2944    1925   54700  10135    100.0    1.227  ! Near Maximum !
-01.6   97    41.80   2951    1933   55101  10145    100.0    1.223  ! Near Maximum !
-01.4   97    41.90   2957    1941   55505  10155    100.0    1.219  ! Near Maximum !
-01.2   97    42.00   2963    1950   55912  10164    100.0    1.215  ! Near Maximum !
-00.9   97    42.10   2969    1958   56321  10174    100.0    1.211  ! Near Maximum !
-00.7   98    42.20   2975    1966   56734  10184    100.0    1.207  ! Near Maximum !
-00.5   98    42.30   2982    1974   57149  10193    100.0    1.203  ! Near Maximum !
-00.2   98    42.40   2988    1982   57568  10203    100.0    1.199  ! Near Maximum !
+00.0   98    42.50   2994    1990   57989  10212    100.0    1.196  ! Near Maximum !
+00.2   99    42.60   3000    1999   58414  10221    100.0    1.192  ! Near Maximum !
+00.5   99    42.70   3006    2007   58841  10231    100.0    1.188  ! Near Maximum !
+00.7   99    42.80   3012    2015   59272  10240    100.0    1.184  ! Near Maximum !
+00.9   99    42.90   3018    2023   59705  10249    100.0    1.180  !DANGEROUS LOAD-DO NOT USE!
+01.2  100    43.00   3025    2031   60142  10259    100.0    1.176  !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     98    42.50   3099    2133   68966   9842    100.0    1.110  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba     98    42.50   2835    1785   47108  10440     98.0    1.310

[Desertdoc]

I have IMR4350, IMR4831, and R12 but interested in other powders as well. If someone has a petload 243 100gr, I would like to hear it as well.

FYI Alliant does not make RL 12. I also, I am wondering how stable the projectile is with your projectile an twist rate. With that combo it may be stable it might not. If it were me, I would buy a good chrono. This is essential.

[FunkeyMonkey]

Thanks Randall for the QL information. I'm going to work my way up with both IMR5350 and IMR4831.

I know Alliant doesn't make RL12 anymore but Hercules use to. I still have 3/4 can. I will save it for 30/30 and 300WM.

This is a new hunting rifle, not looking for match. Should be sub-moa once I find my load. 1-in-10 is the standard twist for 243. 100 grain is the standard deer/antelope bullet for 243. However, it is the top hunting weight. It is what made the 243 popular and not the 244 Remington.

Brownells has 10 inch twist for 243 up to 120 grains

http://www.brownells.com/GunTech/Calibers-and-Twists/detail.htm?lid=11182

Lilja barrel maker has 10 in twist good for 100 gr

http://riflebarrels.com/calibers-and-twist-rates/

When I put the Sierra bullet info in Berger's calculator, it comes out as comfortable stable http://www.bergerbullets.com/twist-rate-calculator/#

Once I work my loads, I will post my results.