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Author Topic: Question re: empty "air" space in 45/70 case.  (Read 734 times)

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Offline KansasPaul

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Question re: empty "air" space in 45/70 case.
« on: December 27, 2008, 02:29:02 PM »
I've been playing around with 45/70 reloads and I've been using 320 grain jacketed bullets and Reloader #7. I'm using CCI magnum primers.  My question is concerning the amount of empty space in the case - the R7 only fills the case part way.  Is this a problem?  Should I use a dacron wad to keep the powder compact?  Will this impact accuracy or do I even need to worry about it?

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Offline stimpylu32

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Re: Question re: empty "air" space in 45/70 case.
« Reply #1 on: December 27, 2008, 04:26:14 PM »
KP
The air space is a non-issue except when using Black Powder or the BP subs , with smokeless I shoot as low as 12 grains of Unique which only fills the first 3/8" of the case and use standard primers if that gives you any idea.

Some powder companies even say to NOT use a filler to avoid over pressure problems .

stimpy
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:D If i can,t stop it with 6 it can,t be stopped

Offline Lone Star

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Re: Question re: empty "air" space in 45/70 case.
« Reply #2 on: December 27, 2008, 07:06:49 PM »
To back up stimpy, Lyman used to list plenty of loads using Dacron filler in their data.  Starting with manual #48 Lyman has stopped listing those loads, and now lists all reduced loads without the filler.


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Online Lloyd Smale

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Re: Question re: empty "air" space in 45/70 case.
« Reply #3 on: December 28, 2008, 04:20:59 AM »
ive shot hundreds of them with 2 to 3 grains of bullseye and a pure lead bullet for plinking and never had a problem. Personaly i dont fool with case fillers.
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Offline BBF

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Re: Question re: empty "air" space in 45/70 case.
« Reply #4 on: December 28, 2008, 11:00:40 AM »
Who makes a 320 gr jacketed bullet?
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Offline winman

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Re: Question re: empty "air" space in 45/70 case.
« Reply #5 on: December 30, 2008, 01:14:17 AM »
Some might find this site interesting:

http://www.gmdr.com/lever/lowveldata.htm

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