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Max Online: 16728 @ 03/25/12 08:51 AM
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#6492796 - 10/12/16 05:06 PM Need help with 308 load data
Sirrah243 Offline
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Registered: 11/05/09
Posts: 1838
Loc: Llano County TX
I'm loading 125 gr in 308 Win with IMR 4895. I have several manuals but the charge weight varies a lot. Nosler 6 says 41.5 to max 45.5. Hodgdon 2016 annual says 48.0 to max 51.8C max. Lee second addition and Hornady 9th I4895 not listed for 125 gr.

What's your manual say?
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#6492813 - 10/12/16 05:15 PM Re: Need help with 308 load data [Re: Sirrah243]
Creedmoor Offline
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Registered: 09/12/16
Posts: 1086
What bullet are you loading?
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#6492822 - 10/12/16 05:21 PM Re: Need help with 308 load data [Re: Sirrah243]
Creedmoor Offline
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51.8 sounds extremely hot to me.

Sierra shows 46.2 as max load.

Hodgdon's online data shows 48.0 as max.

Nosler online doesn't show any data for 125 grain loads.

Sure you're reading your manual correctly?

I'd start at about 43 or so and work the load up from there.
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#6492830 - 10/12/16 05:25 PM Re: Need help with 308 load data [Re: Sirrah243]
Sirrah243 Offline
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Registered: 11/05/09
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Loc: Llano County TX
Youre right 48.0 max.


I'm using Hdy SST
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#6492832 - 10/12/16 05:25 PM Re: Need help with 308 load data [Re: Sirrah243]
Creedmoor Offline
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Registered: 09/12/16
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48.0 sounds much more reasonable.

FWIW, here is a link to Sierra data if you ever need it .....

http://www.6mmbr.citymaker.com/f/Sierra308Win.pdf
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#6492846 - 10/12/16 05:36 PM Re: Need help with 308 load data [Re: Sirrah243]
Sirrah243 Offline
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Registered: 11/05/09
Posts: 1838
Loc: Llano County TX
Thank you.
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#6492870 - 10/12/16 05:57 PM Re: Need help with 308 load data [Re: Sirrah243]
Creedmoor Offline
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Registered: 09/12/16
Posts: 1086
up
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#6492877 - 10/12/16 06:02 PM Re: Need help with 308 load data [Re: Sirrah243]
jeffbird Online   content


Registered: 03/09/09
Posts: 2218
The manuals are general guidelines. Each barrel and combination of brass, bullet, powder, and primer will interact differently. Even different lots of powder will change load data and a max load.

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#6492981 - 10/12/16 07:26 PM Re: Need help with 308 load data [Re: jeffbird]
FiremanJG Online   content
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Registered: 12/16/08
Posts: 21165
Loc: Wolfe City, TX
Originally Posted By: jeffbird
The manuals are general guidelines. Each barrel and combination of brass, bullet, powder, and primer will interact differently. Even different lots of powder will change load data and a max load.


Yup.

OP, if you want to gain a deeper understanding of things, pick a powder, pick a loading data source, and start with a light bullet. Note Max charge, then go to a heavier bullet, note Max charge, carry on until you run out of published data for the heaviest of bullets listed. You'll see a decrease in Max charge as you increase in bullet weight. That will give you a guideline as to what is a safe Max and what is way too light or way too heavy

Switch to another loading data source and go again.
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