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starting charge?

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crazy2medic View Drop Down
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    Posted: 08 January 2015 at 06:16
I'm reloading for my 6mm-06, hodgdon just came out with new
powders, talked with them on the phone in regard to which would be my
best bet, they advised that the slowest the IMR7977 would be my best
choice for trying to push a 70gr. Bullet out the muzzle at 3800fps, here's
the rub they couldn't help me with a starting charge, I'm currently using
H4350 and 240 Weatherby data. Can anybody tell me if there is a
formula for calculating a starting charge for a particular powder?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote CB900F Quote  Post ReplyReply Direct Link To This Post Posted: 08 January 2015 at 07:17
Crazy;

No such formula that I know of. I'm going to presume that you've looked at the Hodgdon on-line site, but what other sources have you checked? What manuals do you have?

I'd think the .240 Weatherby data would be close, but I sure wouldn't take it as gospel. Way too many differences & variables apply.

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crazy2medic View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote crazy2medic Quote  Post ReplyReply Direct Link To This Post Posted: 08 January 2015 at 10:48
I know I can use 240 weatherby starting charges, problem now is the
new powder doesn't even have that, IMR7977 is slightly faster than
H1000 so guess I have more research ahead, thanks for your input and
if anybody has additional info I would appreciate your help
I have the new hodgdon 2015 reloading manual, Lyman reloading
manual, hornady reloading manual

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Post Options Post Options   Thanks (0) Thanks(0)   Quote BEAR Quote  Post ReplyReply Direct Link To This Post Posted: 08 January 2015 at 10:59
I'd compare case capacity of water, first. find something in 6mm with the same, or slightly larger...then reduce it 10% for start.

There is was a POWLEY calculator/computer that let you calculate loads for known powders. But this is a new powder without any data? Powley needed things like barrel volume (easy to figure).

Maybe you are rushing it, could use you reg powders until published data comes out? trying to work with unknown powder is sailing in uncharted waters.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote crazy2medic Quote  Post ReplyReply Direct Link To This Post Posted: 08 January 2015 at 14:12
The case capacity of the 6mm-06 is a half a grain more than the 240
weatherby, which is why I'm using that has my starting data, I have 8lbs
of H4350 and will probably use that for a bit, was just wanting to find
out if there was a way to calculate a starting charge from two similar
cartridges, hodgdon doesn't have any data for the 240 weatherby, they
do for the 25-06 but the bullet weights are different and the case mouth
is different, just too many variables for me to be comfortable!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote CB900F Quote  Post ReplyReply Direct Link To This Post Posted: 08 January 2015 at 14:54
Fella's;

A large part of the problem with starting, or reduced, loads, is that the lesser amount of powder filling the case can create it's own dangerous situation. It's been found that powder charges that fill the case burn one way, but if the reduced amount lies flat in the case, the flame front can travel over the charge rather than burn it from primer to neck. And that in turn can cause what amounts to an explosion in the case rather than a progressive burn.

I'd be starting with known data before trying any experiments. KABOOMS are no fun, hard on guns and frequently very hard on flesh.

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Post Options Post Options   Thanks (0) Thanks(0)   Quote Irish Bird Dog Quote  Post ReplyReply Direct Link To This Post Posted: 12 January 2015 at 17:40
did not check these out but you might look thru them to
see if you can find any help with your questions.
HIGH LIGHT THE LINK and then click in the box to open


6mm-06 - CHUCKHAWKS.COM
www.chuckhawks.com/6mm-06.htm
6mm-284 data can be used as a starting point for working
up 6mm-06 loads. As always, and especially with a wildcat
cartridge, start with the minimum load and ...
6mm-06 build - Page 2 - Long Range Hunting Online
Magazine
www.longrangehunting.com ... Hunting The Basics,
Starting Out
Jan 4, 2012 - 7 posts - ‎5 authors
This comes from experience with the 6mm-06. You are
opening a huge can of worms. Reloading data is hard to
find. When you down size the ...
6mm-06 loads - PredatorMasters Forums
www.predatormastersforums.com ... Hunting Reloading
& Ammo
Jul 24, 2011 - 10 posts
Posts: 420. Loc: Utah. You can use 6X284 data. The case
capicity is almost exactly the same. Necking down 25-06
is the easiest way to go.
6mm06 Springfield load work     11 posts     Dec 15,
2014
Let's talk 6mm-06     15 posts     Sep 7, 2014
6.5x284 Norma Load Data Help     9 posts     Dec 5, 2010
Need super rockchucker load data     15 posts     
Apr 12, 2005
More results from www.predatormastersforums.com
6mm-06 Wildcat - RifleShooter
www.rifleshootermag.com/.../ammunition_rs_6mm06wildcat_20
0808/
Jan 4, 2011 - I am unaware of any pressure-tested load
data that has been published for the 6mm-06, but since
its case capacity is quite close to that of the ...
6mm-06 Load Data - LoadData.com
https://www.loaddata.com/members/search_detail.cfm?
MetallicID=436
LoadData.com is the largest resource online for reloading
information and data for 6mm-06 Load Data loads.
Information includes weight(Wt.), bullet, powder ...
6mm/06 Load data - Shooters Forum
www.shootersforum.com Rifle and Rifle Cartridges
Wildcat Cartridges
Feb 18, 2009 - 9 posts
I have a 6mm/06 on a Pre 64 Winchester 70. Only load data
I have is in Ackley's books. too old for my tastes so I'd
appreciate and data you can ...
The 6mm/06     14 posts     Nov 17, 2014
6mm-06 What are your thoughts?     20 posts     Jan 20,
2010
6mm-06 / 243-06 / 240 Gib     20 posts     Nov 6,
2003
6mm-06     4 posts     Feb 19, 2002
More results from www.shootersforum.com
Nosler Reloading Forum View topic - 240 Weatherby or
6mm-06?
forum.nosler.com/viewtopic.php?f=4&t=26142
Nov 18, 2013 - 25 posts - ‎12 authors
The practical choice would be the 6mm-06 but how many of
us are practical : .... Predicted data by increasing and
decreasing the given charge,
243-06? - The Firing Line Forums
thefiringline.com ... The Hide The Art of the
Rifle: General
Nov 30, 2011 - 25 posts - ‎18 authors
yes I just read a short article about 6mm 06 which was
basically the ..... My 284 reloading data did come from
the 6br site gun of the week and I ...
6mm-06, .243 Catbird? - Forum
forum.accurateshooter.com ... 6mm-06, .243 Catbird?
Jan 25, 2011 - 8 posts - ‎7 authors
Another wildcat to consider is the 243 SuperRockChucker.
I picked one up a couple of years ago. I used 240 Wby
load data. I ran 25-06 brass ...
Let's talk 6mm-06     15 posts     Sep 7, 2014
6mm/06 & loving it!!!     12 posts     Jun 16, 2014
Coverting 700 BDL 30-06 to 240/6mm     9 posts     Nov 3,
2011
More results from forum.accurateshooter.com
6mm-06 loads - 24hourcampfire
www.24hourcampfire.com Forums Reloading Varmint
Rifles
Mar 27, 2010 - 10 posts
#3939562 - 03/27/10 07:15 AM Re: 6mm-06 loads [Re:
halfmile] ... Be Alert: Publisher cannot be responsible
for errors in published load data.
Searches related to 6mm-06 reloading data
6mm ppc reloading data
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Edited by Irish Bird Dog
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crazy2medic View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote crazy2medic Quote  Post ReplyReply Direct Link To This Post Posted: 13 January 2015 at 12:21
Thanks IBD, I was attempting to find a Starting load for hodgdon new
powder IMR7977, this is slightly faster than H1000, I found a load for an
80gr bullet using H1000, this would require me to reduce the starting
charge by 5% for the difference in burn rate, and since I'll be using a
70gr.bullet I believe that should be correct, just not real comfortable
with the idea of not having hard data!
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