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jnfarra

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Reply with quote  #1 
A Place Where We can Share Our Load Data.

Please refrain from posting other info here. 

https://docs.google.com/spreadsheets/d/1a4H02BQwSWC6rL8y-gwUFJLILTmxJSSnoLGZUpSmnZ0/edit?usp=sharing

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Moleman

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Reply with quote  #2 
I've got cases grouped by capacity from 31.5gr up to 34.8gr water capacity depending on the headstamp and how they were modified.  It is important to know what the water capacity of your case is before working up to a max load using someone elses data based off of a different water capacity.  Little changes in seating depths & case capacity can result in big changes in pressure.  With that in mind here are a few of the bullets I've shot with some of the powders I've used in cases that have a 33.5gr average water capacity.  Velocities are for 16" barrels. 

 

158gr XTP 

                       COL 1.950    Powder 2400        19.5-21.0 gr     PSI 46K-57K     FPS 2080-2207       Seating depth 0.325" 
 
                       """""""""""    Powder W296        24.0-25.5 gr     PSI 47K-58K     FPS 2180-2320
         
                      """""""""""     Powder LilGun       23.5-25.0 gr     PSI 46K-58K     FPS 2180-2300

                      """""""""""     Powder IMR4227   22.5gr              PSI 40K            FPS 1980

180gr XTP 
   
                    COL 1.950      Powder 2400        17.0-18.5 gr     PSI 44K-56K     FPS 1860-1990       Seating depth  0.445"

                    COL 2.080      """""""""""""         19.0-20.5 gr     PSI 47K-57K      FPS 1950-2070       Seating depth 0.315"

                    COL 1.950     Powder LilGun       20.5-22.0 gr     PSI 44K-57K     FPS 1950-2080

                    COL 2.080    """"""""""""""""       22.5-24.0 gr     PSI 45K-56K     FPS  2020-2130

                    COL 1.950  Powder IMR4227       19.5 gr            PSI 38K            FPS  1760

                  

180Gr Hornady SSP

                   COL  2.235    Powder 2400          18.5-19.7 gr     PSI 48K-56K     FPS 1940-2030          Seating depth  0.348"

                   ''''''''''''''''''''      W296                   22.5-24.0 gr     PSI 47K-58K     FPS 2030-2150

                  '''''''''''''''''''       LilGun                   22.0-23.2 gr     PSI 47K-56K     FPS 2020-2110

                  """""""""""      IMR4227                22.0 gr             PSI 46K            FPS 1920    

180gr Speer HCFN

                   COL   2.200"  Powder W296        23.0-24.7gr      PSI 46K-57K     FPS 2030-2170           Seating depth  0.290"

                    """"""""""""    LilGun                   22.5-24.0gr     PSI 45K-56K      FPS 2020-2130

                 
200gr Sierra RN

                   COL  2.210"  Powder 2400          18.0-19.3 gr     PSI 48K-57K     FPS 1846-1940             seating depth 0.263"
       
                   ''''''''''''''''''''     W296                    21.5-23.0 gr     PSI 45K-56K    FPS  1913-2032            
                   
208gr RCBS-GC   Cast

                  COL  2.140"   powder W296         22.0-23.0 gr     PSI 47K-55K      FPS 1910-1990              Seating depth 0.360"

                  """"""""""""      LilGun                   21.5-22.5 gr     PSI 47K-55K      FPS 1890-1960


228gr NOE FN-GC Cast

                 COL  2.100"   Powder W296          19.3-20.3 gr      PSI 48K-57K      FPS 1750-1830             Seating depth 0.510"

                 COL  2.150    LilGun                      19.5-20.5 gr     PSI 47K-56K      FPS 1740-1810             Seating depth 0.460"       



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Brunosplace

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Reply with quote  #3 
Added all of the bullet info I had posted before to the workbook.

 
Attached Files
xlsx 357AR Bullet possibilities.xlsx (13.44 KB, 8 views)

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willbird

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Reply with quote  #4 
When you measure water capacity...is that a case with a bullet seated ??

Bill
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wikster1983

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Reply with quote  #5 
Quote:
Originally Posted by willbird
When you measure water capacity...is that a case with a bullet seated ??

Bill
Empty case- filled to top of neck with h2o. (resized with spent primer placed back in to plug primer hole)

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Moleman

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Reply with quote  #6 
I generally will do a sized cased to get the initial capacity, but after that use a fired case as it's closer to the true capacity since the case will easily expand up to chamber size. Use a the side of a utility knife blade to card the extra water off of the case so that the square back edge pushes the excess water off of the case, then slide the blade back off of the case. Except for the reflective surface the case almost looks empty when doe this way.   
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willbird

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Reply with quote  #7 
Makes perfect sense :-).

Bill
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22khornet

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Reply with quote  #8 
Is this FPS our of a 16” barrel?
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wikster1983

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Reply with quote  #9 
Quote:
Originally Posted by 22khornet
Is this FPS our of a 16” barrel?

All of the MDWS 357AR are 16" right now.

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Moleman

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Reply with quote  #10 
Quote:
Originally Posted by 22khornet
Is this FPS our of a 16” barrel?


Yes, I use the 16" as the basis for velocity unless stated otherwise.  At 16" you've got the majority of the velocity although you will still see increases with a longer barrel.  Here's one of the loads listed from above that my son got his deer with this year.  The actual magneto speed chronograph average was about 20fps faster. If it's hard to read just push the control button and use the mouse wheel to make it bigger. 

  357AR180ssp23.5W296-33.5water.jpg 



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