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Smoke
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Light loads for .40-55
Mar 21st, 2019 at 8:37pm
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I recently acquired a Marlin Firearms Ballard with a Ward Koozer rebored barrel in .40-55.  (.38-55 bored out to .403").

The previous (and now deceased) owner was shooting it with 5 gr FFFFg topped with 45 gr Fg.

I'd prefer to use smokeless.

I have a 300 gr mold that size and am trying to figure out what might be a light plinking load with either 4227 or 4759.

I'd appreciate any pointers or suggestions.
  
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marlinguy
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Re: Light loads for .40-55
Reply #1 - Mar 21st, 2019 at 8:44pm
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I don't shoot the caliber, but sounds much like my .40-50SS that I shoot a similar RCBS CSA 300 gr. bullet in. I use 2400 myself, and a 17.0 gr. load works for me.
If you wanted to use 4759 I'd go with around 10.5 grs. with this caliber and bullet. Only around 1100 fps.
  

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Smoke
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Re: Light loads for .40-55
Reply #2 - Mar 21st, 2019 at 10:18pm
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marlinguy wrote on Mar 21st, 2019 at 8:44pm:
If you wanted to use 4759 I'd go with around 10.5 grs. with this caliber and bullet.

Sounds like a good place to start. 

marlinguy wrote on Mar 21st, 2019 at 8:44pm:
Only around 1100 fps.

Should be good for minute of soup can at 50 yards

Thanks
  
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boats
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Re: Light loads for .40-55
Reply #3 - Mar 22nd, 2019 at 6:17am
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Sub sonic lead bullet Unique works well.  I use a fixed rotor pistol measure move up until the load “cracks” goes supersonic. Then back down one rotor to stay sub sonic.

Don’t know about your .40 but 32/40 it’s about 4.5 Unique 45/70 roughly 8.0

Boats
  
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joeb33050
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Re: Light loads for .40-55
Reply #4 - Mar 23rd, 2019 at 6:43am
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I bought 41 mag pistol bullets and shot them in a Hepburn 40-1 7/8 = 40/50 SS with Unique. These shot surprisingly well out to 200 yards. I just looked, Missouri Bullet Co. sells bullets for ~ $50/500.

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« Last Edit: Mar 23rd, 2019 at 2:13pm by joeb33050 »  
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boats
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Re: Light loads for .40-55
Reply #5 - Mar 23rd, 2019 at 10:20am
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Depends on expectations, gallery offhand matches 50 foot some very high scores shot with sub sonic light bullets using Pistol powders . It’s so close doubt if anybody could tell differences precesion 200 yard load vs 50 foot load. Add distance no doubt there is a significant difference.

Having said that Fairfax R&G Club 200 yard offhand swinger match was won often with 45/70 330 gr bullet & 8.4 grs W231.

Boats
  
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marlinguy
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Re: Light loads for .40-55
Reply #6 - Mar 23rd, 2019 at 12:27pm
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I agree with Boats. I'd use a 300-350 grain bullet, even if my distance was only 100 yds., and they'll do well beyond 200 yds. too. I've used the RCBS CSA bullets in this weight range and had excellent results even at 650 yds. with light loads that chronograph around 1250-1300 fps. in my guns.
I've tried heavier 400-420 gr. bullets and they work well also, but not any better, and recoil isn't as mild.
  

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