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Author Topic: FPS from the 45/70 BC ??  (Read 462 times)

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Offline Default

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FPS from the 45/70 BC ??
« on: February 05, 2008, 05:27:39 AM »
 Ok Boys,

  Got a question for you 45/70 BC owners ..

   Any of you reloaders chrono'd the Feet Per Second gain from the longer barreled BC over a stock length 22" barrel ?

  Come on Tim !! I know You Know !!  heh

  Anyhow I was curious and couldn't locate the data myself..

   Thanks in advance,

  Default
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Offline quickdtoo

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Re: FPS from the 45/70 BC ??
« Reply #1 on: February 05, 2008, 05:41:55 AM »
I did a comparison with a couple 350gr bullets on this range report..

http://www.gboreloaded.com/forums/index.php/topic,102319.msg1098277453.html#msg1098277453

One other that I did was with Mac's 300gr Nosler partition load, it does 2425fps in a 22" barrel, 2450fps in the 32" barrel, so H4198 isn't a good powder to use to take advantage of the extra 10" of barrel.

Tim
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Offline Default

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Re: FPS from the 45/70 BC ??
« Reply #2 on: February 05, 2008, 05:52:48 AM »
Tim         Your the Man ,

  Some how i just knew ;) You knew...

   So then a slower burning powder would be the most beneficial for that long BC tube Tim ?
 
   Keep in mind I'm still learning in the art of reloading ,so I may have some question for you from time to time :D

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"Freedom is never more than one generation away from extinction. We didn’t pass it on to our children in the bloodstream. It must be fought for, protected, and handed on for them to do the same, or one day we will spend our sunset years telling our children what it was once like in the United States when men were free." ~Ronald Reagan

THE QUICKEST WAY TO ENSLAVE A PEOPLE IS TO DISARM THEM ~ George Mason

Offline knight0334

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Re: FPS from the 45/70 BC ??
« Reply #3 on: February 05, 2008, 07:16:39 AM »
Yes, you need a slower powder to get the most out of it.   A faster burning powder may get you fast speeds in a short tube, but your slug may loose speed by the time it exits if pressures drop too far off.


I'm pushing 250-265gr slugs close to 2800fps and 300gr slugs to about 2500fps with a 32" BC barrel.   Pressures are in the upper levergun area.   I dont shoot anything heavier than some experimental 325gr slugs, the vast majority are 300gr'rs or 300gr'rs drilled out to 250 +/- grs.

...slow/medium burning powder, lots of of it.
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Offline EsoxLucius

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Re: FPS from the 45/70 BC ??
« Reply #4 on: February 05, 2008, 08:40:52 AM »
With H335 and 405 grain Remington JSPs I get 1930 fps in my 22" Marlin 1895 and 2075 fps in my W&H 1871 Buffalo Classic.  Not fun to shoot in the BC.  I now shoot 488 grain Schmittzers at 1200 fps.
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Offline Default

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Re: FPS from the 45/70 BC ??
« Reply #5 on: February 05, 2008, 12:09:41 PM »
Much thanks guys,

  You all are a great library of Gun knowledge ;)

   Kinda surprised at how fast those 250 grainers are pushing outta that BC for you knight..

  And yeah Esox I wouldn't imagine 405 gr monsters being any fun are hot speeds , especially with no recoil pad the way the BC is set up..

  Think this intel makes me more excited about getting one  ;D

  Thanks and regards ,

  Default
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"Freedom is never more than one generation away from extinction. We didn’t pass it on to our children in the bloodstream. It must be fought for, protected, and handed on for them to do the same, or one day we will spend our sunset years telling our children what it was once like in the United States when men were free." ~Ronald Reagan

THE QUICKEST WAY TO ENSLAVE A PEOPLE IS TO DISARM THEM ~ George Mason

Offline quickdtoo

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Re: FPS from the 45/70 BC ??
« Reply #6 on: February 05, 2008, 12:12:45 PM »
I don't shoot either of my BCs without the Galco, between it and a 16oz MRS, it's not so bad.  ;)

Tim

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Offline knight0334

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Re: FPS from the 45/70 BC ??
« Reply #7 on: February 06, 2008, 12:34:04 AM »
Quote from: Default on February 05, 2008, 12:09:41 PM
Much thanks guys,

  You all are a great library of Gun knowledge ;)

   Kinda surprised at how fast those 250 grainers are pushing outta that BC for you knight..

  And yeah Esox I wouldn't imagine 405 gr monsters being any fun are hot speeds , especially with no recoil pad the way the BC is set up..

  Think this intel makes me more excited about getting one  ;D

  Thanks and regards ,

  Default

So are the woodchuck that catch them.  lol  :D
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