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mm1ut1
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365gr bullets for 38/55 loads
Aug 27th, 2013 at 6:13pm
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I obtained a load of cast 365 gr bullets for my 38/55, but can find no handload data for them. It is for a single shot Martini action. Anyone have experience with them ? TIA !
  
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Elijah
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Re: 365gr bullets for 38/55 loads
Reply #1 - Aug 27th, 2013 at 7:38pm
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Try about 40-45 gr of Swiss 1.5 and a .030" wad.
  
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boats
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Re: 365gr bullets for 38/55 loads
Reply #2 - Aug 27th, 2013 at 8:40pm
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It's a long heavy bullet takes a fast twist.  My 18 inch twist 38/55 does fine with 300 grs doubt it would shoot that bullet well.   300 gr about 17.5 of 4227 or 4759 is a good load.  More bullet weight use less powder start low and work up.

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Elijah
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Re: 365gr bullets for 38/55 loads
Reply #3 - Aug 27th, 2013 at 9:45pm
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I'll bet it would do good with my C. Sharps with a 1:14 twist. Just a tad heavy for my liking, however.
  
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QuestionableMaynard8130
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Re: 365gr bullets for 38/55 loads
Reply #4 - Aug 29th, 2013 at 3:14pm
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what is your barrel twist?
  
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Chickenthief
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Re: 365gr bullets for 38/55 loads
Reply #5 - Aug 29th, 2013 at 4:35pm
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More interestingly, how long is that torpedo?
  
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Re: 365gr bullets for 38/55 loads
Reply #6 - Aug 29th, 2013 at 4:59pm
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Or do the math yourself

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SSShooter
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Re: 365gr bullets for 38/55 loads
Reply #7 - Aug 29th, 2013 at 8:06pm
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Am shooting with someone who is shooting a 365gr 'Money' bullet in his 38-55 in front of 45gr of 1 1/2F Swiss and having good accuracy. Am thinking he is using either a 12" or 13" twist barrel. Thus far he has not been having any trouble with the rams.
  
Glenn - 2x CPA 44 1/2 w/22LR (Shilen ratchet-rifled & Bartlein 5R rifled), 38-40RH & 38-55WCF (Bartlein 5R rifled) & 40-65WCF (GrnMtn 'X') barrels
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Schuetzendave
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Re: 365gr bullets for 38/55 loads
Reply #8 - Aug 30th, 2013 at 11:34am
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For 38 calibers (Greenhill's formula):

1:18 Twist Maximum 1.2" bullets: approximately 315 grains
1:16 Twist Maximum 1.35" bullets: approximately 340 grains
1:14 Twist Maximum 1.54" bullets: approximately 370 grains

     Don Miller's Twist Rule                        
                             
                             
     Caliber      0.379      Inches            
     Bullet Weight      305      Grains            
     Bullet Length      1.15      Inches            
     Barrel Twist      18      Inches/turn            
     muzzle velocity      1300      fps            
     Temperature      60      degrees Fahrenheit (59 is standard)            
     Pressure      29.92      inches of mercury (29.92 is standard)            
                             
     Sg =      1.87      

     Caliber      0.379      Inches
     Bullet Weight      305      Grains
     Bullet Length      1.15      Inches
     Barrel Twist      18      Inches/turn
     muzzle velocity      1600      fps
     Temperature      60      degrees Fahrenheit (59 is standard)
     Pressure      29.92      inches of mercury (29.92 is standard)
                 
     Sg =      2.00      
           
                             
           Caliber      0.379      Inches            
     Bullet Weight      370      Grains            
     Bullet Length      1.54      Inches            
     Barrel Twist      14      Inches/turn            
     muzzle velocity      1300      fps            
     Temperature      60      degrees Fahrenheit (59 is standard)            
     Pressure      29.92      inches of mercury (29.92 is standard)            
                             
     Sg =      1.63                  
                             
     Sg shouldn't be less than 1.4.  If Sg is greater than about 2.0, you may                        
     gain some accuracy by going to a slower twist barrel.                        
           
So I ordered an Accurate Molds .38-305L mold for my 1:18 barrel which I will chamber to .38-50 Remington Hepburn. It will allow me to shoot the cast bullet up to 1600 fps. or shoot at slower speeds to allow for weather changes.
« Last Edit: Aug 30th, 2013 at 1:20pm by Schuetzendave »  
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Re: 365gr bullets for 38/55 loads
Reply #9 - Aug 30th, 2013 at 1:57pm
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Let us know how that 38-50 works out for you. A couple of folks on the Shiloh forum are shooting them with very good results. One is loading 50gr of 1 1/2F Swiss and doing well on silhouettes with several scores this year above 30. But, he is shooting a 12" twist barrel and 335-365gr bullets.
  
Glenn - 2x CPA 44 1/2 w/22LR (Shilen ratchet-rifled & Bartlein 5R rifled), 38-40RH & 38-55WCF (Bartlein 5R rifled) & 40-65WCF (GrnMtn 'X') barrels
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Schuetzendave
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Re: 365gr bullets for 38/55 loads
Reply #10 - Aug 30th, 2013 at 2:05pm
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If I had ordered the barrel I would have gone to a tighter twist and used it for silhouette BPCR.
However I won the barrel with a 1:18 twist so I will make a practice chicken rifle. 
It will be better suited as a Cowboy action rifle and/or a sporting rifle since I will not be able to shoot the heavier bullets.
« Last Edit: Aug 30th, 2013 at 2:22pm by Schuetzendave »  
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Re: 365gr bullets for 38/55 loads
Reply #11 - Aug 31st, 2013 at 7:05am
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Think you will be pleasantly surprised with the 305gr bullet and the rams. I'm shooting 57gr of Goex 2F behind my 325gr Money bullet and 340gr Brooks bullet and both knock over the rams with authority. When I hit them they go down. Have yet to ring one. With 50gr of 1 1/2F or 2F Swiss am guessing your 305gr bullet will be going fast enough to have similar results.
  
Glenn - 2x CPA 44 1/2 w/22LR (Shilen ratchet-rifled & Bartlein 5R rifled), 38-40RH & 38-55WCF (Bartlein 5R rifled) & 40-65WCF (GrnMtn 'X') barrels
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