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#5470404 - 12/10/14 08:52 PM 300 win mag load data
daniel1381 Offline
Veteran Tracker

Registered: 03/07/12
Posts: 3497
Loc: longview texas
What are yalls specs on loading 300 win mag.
I have 208 amax and 230 bergers to load.
Amax powder h1000
Berger powder retumbo

Rifle details rem 700 rws custom 24 in barrel
_________________________
"From my cold dead hands"

"Any fool can criticize, condemn and complain - and most fools do."

Benjamin Franklin


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#5470786 - 12/11/14 07:24 AM Re: 300 win mag load data [Re: daniel1381]
jeff1383 Offline
Tracker

Registered: 05/19/11
Posts: 873
Loc: Frisco
74.5gr retumbo 230gr hybrid 20/1000thds off in norma brass gives me 2780 avg mv
76.0gr h1000 230gr hybrid 20/1000 off in norma brass gives me 2855 avg mv with an sd of 11.
I use cci lrg rifle magnum primers with these loads.

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#5470797 - 12/11/14 07:28 AM Re: 300 win mag load data [Re: daniel1381]
daniel1381 Offline
Veteran Tracker

Registered: 03/07/12
Posts: 3497
Loc: longview texas
Whats ur coal?
_________________________
"From my cold dead hands"

"Any fool can criticize, condemn and complain - and most fools do."

Benjamin Franklin


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#5470971 - 12/11/14 08:52 AM Re: 300 win mag load data [Re: daniel1381]
jeff1383 Offline
Tracker

Registered: 05/19/11
Posts: 873
Loc: Frisco
3.630 is a 20/1000 jump in my rifle. Not sure where that may put the bullet in your paticular chamber.

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#5471188 - 12/11/14 10:56 AM Re: 300 win mag load data [Re: daniel1381]
jeffbird Offline


Registered: 03/09/09
Posts: 1709
Originally Posted By: daniel1381
Whats ur coal?


Every rifle will be different.

You will have to measure your own.

Load a bullet into an empty case with no primer and no powder.

Hold the bullet over a kitchen match so that the bullet is covered in soot.

Gently place it in the chamber and close the action.

Gently extract it, and look for marks made by the lands (rifling).

They will appear as a small square at regular intervals around the bullet at the ogive.

The ogive is where the curve of the bullet straightens out into the flat length of the body of the bullet.

You do not want the bullets jamming into the rifling as that causes a pressure spike early in the timeline.

Keep re-coating with soot and setting back 0.010" at a time until there are no more contact marks showing up.


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#5471310 - 12/11/14 11:51 AM Re: 300 win mag load data [Re: daniel1381]
GLC Offline


Registered: 02/25/09
Posts: 4109
Loc: Burleson Texas
How to set a coal easily.
Try this.
For safety reasons always find the coal for your specific rifle.
_________________________


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#5471337 - 12/11/14 12:01 PM Re: 300 win mag load data [Re: daniel1381]
MacDaddy21 Offline
Pro Tracker

Registered: 08/19/11
Posts: 1593
Loc: CO
I'm running 76.8 gr H1000 under a 208 amax in my custom 300WM. Shooting under Sub MOA out to 600 yds so far.
The rifle is a custom build with a Lilja stainless match barrel, 1:10 @ 27". Seating them long, with .010" jump. COAL is 3.648".

To determine COAL, I used a method similar to what Jeff described. Works very well.

5 shots, 300 yds



3 shots, 600 yds, 2.34"

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#5472175 - 12/11/14 08:02 PM Re: 300 win mag load data [Re: MacDaddy21]
jeff1383 Offline
Tracker

Registered: 05/19/11
Posts: 873
Loc: Frisco


Damn fine shooting! What kind of MV are you getting with the 208amax?
5 shots, 300 yds



3 shots, 600 yds, 2.34"
[/quote]


Edited by jeff1383 (12/11/14 08:03 PM)

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#5472329 - 12/11/14 09:48 PM Re: 300 win mag load data [Re: daniel1381]
MacDaddy21 Offline
Pro Tracker

Registered: 08/19/11
Posts: 1593
Loc: CO
Thanks Jeff, they are running around 2850 fps. I'm loving the 208's. Dropped a doe at 200 yds this season. Can't wait to shoot something a little further out.

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#5473807 - 12/12/14 08:28 PM Re: 300 win mag load data [Re: daniel1381]
spg Offline
Tracker

Registered: 08/11/13
Posts: 903
I'm running a 200 NAB @ 2890 with 71 grains of 4831. If I could find the hybrid berger's they would be my first choice. Don't like shooting a bonded bullet for hunting at long range.

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