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Author Topic: 44 mags different rifling? UPDATE!!  (Read 887 times)

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Offline jloehm

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44 mags different rifling? UPDATE!!
« on: June 27, 2011, 03:27:48 PM »
I just received my barreled action back from the factory with my second .44 barrel (bought my first one last year.)  The first thing I noticed was the rifling.  There are twice as many grooves as the one I already had.  What different rifling has H&R used in their .44 barrels ,  when did they change, and why?
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Offline cwlongshot

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Re: 44 mags different rifling?
« Reply #1 on: June 27, 2011, 03:34:05 PM »
Quote from: jloehm on June 27, 2011, 03:27:48 PM
I just received my barreled action back from the factory with my second .44 barrel (bought my first one last year.)  The first thing I noticed was the rifling.  There are twice as many grooves as the one I already had.  What different rifling has H&R used in their .44 barrels ,  when did they change, and why?

Marlin bought them and made that barrel.. It's merely a Marlin Micro Groove barrel...  Why source a barrel from a competitor when you can make them in-house. Simply better business. Now if its a better barrel or not is another question entirely. Marlin barrels have always been quite serviceable.

CW
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Offline jloehm

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Re: 44 mags different rifling?
« Reply #2 on: June 27, 2011, 03:42:25 PM »
AH, that makes sense!  Any experiences with loading for the micro-groove barrels,  or anything special I should know about them?  This will be my deer gun this fall and want to begin working up loads for it.  My boy will be getting my older one.
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I don't think it's nice, you laughin'. You see, my mule don't like people laughing. He gets the crazy idea you're laughin' at him. Now if you apologize, like I know you're going to, I might convince him that you really didn't mean it.

Offline cwlongshot

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Re: 44 mags different rifling?
« Reply #3 on: June 27, 2011, 04:42:01 PM »
Quote from: jloehm on June 27, 2011, 03:42:25 PM
AH, that makes sense!  Any experiences with loading for the micro-groove barrels,  or anything special I should know about them?  This will be my deer gun this fall and want to begin working up loads for it.  My boy will be getting my older one.

Not really, as I said Marlin makes a good barrel. I guess the worst that could be said would be if you shoot allot of lead the shallow rifling fouls faster then standard rifling...
My all time favorite 44 bullet for deer hunting is the Speer GD SP 270 gr...

Good luck,
 CW
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Offline quickdtoo

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Re: 44 mags different rifling?
« Reply #4 on: June 27, 2011, 05:29:07 PM »
I wouldn't worry about the MG rifling, a good jacketed or properly sized cast bullet will shoot just fine.  ;)

Tim


http://www.lasc.us/fryxellmarlin-microgroove.htm
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Offline jloehm

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Re: 44 mags different rifling?
« Reply #5 on: June 27, 2011, 05:48:36 PM »
Good Deal,  Thanks guys!  This rifle will be fed pretty much jacketed bullets only, xtp's or noslers on top of hefty loads of H110 or 2400.  Now to the reloading bench!
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I don't think it's nice, you laughin'. You see, my mule don't like people laughing. He gets the crazy idea you're laughin' at him. Now if you apologize, like I know you're going to, I might convince him that you really didn't mean it.

Offline geezerbiker

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Re: 44 mags different rifling?
« Reply #6 on: June 27, 2011, 06:14:46 PM »
I would be interested to know what it slugs out to...

Tony
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Offline jloehm

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Re: 44 mags different rifling?
« Reply #7 on: June 27, 2011, 08:03:09 PM »
What's the easiest way to slug the bore?  I understand the idea,  but haven't done it before.  I did hear nightmare stories of some marlins with micro grooves slugging at .433 or .434!  I was worried so tried to press a .429 in the bore,  no-go.
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I don't think it's nice, you laughin'. You see, my mule don't like people laughing. He gets the crazy idea you're laughin' at him. Now if you apologize, like I know you're going to, I might convince him that you really didn't mean it.

Offline quickdtoo

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Re: 44 mags different rifling?
« Reply #8 on: June 27, 2011, 09:43:37 PM »
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Offline jloehm

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Re: 44 mags different rifling?
« Reply #9 on: June 28, 2011, 05:36:52 AM »
Just slugged the new barrel and looks like .4315,  which doesn't sound too bad.
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I don't think it's nice, you laughin'. You see, my mule don't like people laughing. He gets the crazy idea you're laughin' at him. Now if you apologize, like I know you're going to, I might convince him that you really didn't mean it.

Offline 45-70.gov

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Re: 44 mags different rifling?
« Reply #10 on: June 28, 2011, 05:48:46 AM »
Quote from: jloehm on June 28, 2011, 05:36:52 AM
Just slugged the new barrel and looks like .4315,  which doesn't sound too bad.

sounds  big to me

i bet thats an  old barrel.......mine tumbles  my sized bullets

try shooting  un sized cast..........mine  won't even chamber in  my revolvers

shoots jacketed  ok..........my  new  44 shoots every thing
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Offline jloehm

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Re: 44 mags different rifling?
« Reply #11 on: June 28, 2011, 07:00:07 AM »
I might have been hasty,  I remeasured with my mic (measured with calipers the first time) and got .4305.  Just a general question though about jacketed bullets and bore diam.  Why is it that jacket bullets will stabilize if slightly overbored and cast won't?  Is it that the lead isn't hard enough to grab the rifling and just slides past?  I'm relatively new to the reloading game and am trying to get my mind around the nuances of overbore. 
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I don't think it's nice, you laughin'. You see, my mule don't like people laughing. He gets the crazy idea you're laughin' at him. Now if you apologize, like I know you're going to, I might convince him that you really didn't mean it.

Offline quickdtoo

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Re: 44 mags different rifling?
« Reply #12 on: June 28, 2011, 07:23:34 AM »
The SAAMI spec for rifle bores isn't the same as pistols, it's bigger. When Marlin's rifling broaches near the end of their useful service life after being sharpened as much as possible before they're replaced, the bore they cut will be the smallest, new broaches will cut a larger bore, that's why there's a tolerance standard.


Rifle:
Bore- .424" +/- .001"
Groove- .431" +/- .001"

Pistol:
Bore- .417" +/- .001"
Groove- .429" +/- .001"


Tim

http://www.gboreloaded.com/forums/index.php/topic,235070.msg1099326668.html#msg1099326668
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Offline jloehm

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Re: 44 mags different rifling?
« Reply #13 on: June 28, 2011, 03:25:25 PM »
Well, I had a window of time and got out to shoot the new barrel.  Good news!  All shots were touching at 40 yards with the 200 gr. xtps on top of 28 gr. H110.  That's better than my older barrel ever did with this load.  I'm happy.  Thanks for the help fellas.
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I don't think it's nice, you laughin'. You see, my mule don't like people laughing. He gets the crazy idea you're laughin' at him. Now if you apologize, like I know you're going to, I might convince him that you really didn't mean it.

Offline gcrank1

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Re: 44 mags different rifling? UPDATE!!
« Reply #14 on: June 29, 2011, 06:28:31 AM »
It is more than the rifling just impressing and spinning the bullet, with lead it also is the hot (very hot) pressurized gases that should be behind that will gas cut the base band and up around the sides and maybe even down the rifling between the bullet and groove depth that degrades the bullet and leads the bore. A jacket keeps this from happening and is much more 'forgiving'.
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