300 Win Mag reloading data Q's

[excaliber]

My gun is a Rem 700 bdl 300 WM made for Cabelas with a 26" fluted barrel and a Leupold 4.5x14x40 CDS scope mounted on it.
It really likes the Federal 180 gr speer SP loads at factory specs of 2960fps. I have no chrono yet. It did not like the Doubletap loaded Accubond's rated at 3050 fps at all.

I want to start with the Accubond's(180gr)


I'm just starting to get my supplies together to reload my 300 Win Mag. This is going to be a hunting round not a long distance precision target load. I'd like to be able to shoot out to 600 yards for practice with most of my hunting shots being much, much shorter in distance.

I finally have Winchester brass. I have Fed 215 LM Primers and Nosler Accubonds(180 gr) I'm still searching for some H4831sc or RL22 as I'd like to start there.

It's hard to find data with the components I have. The closest seems to be from Winchester as it specs Win brass and the Nosler Etip bullet.

Shown below.

Are these conservative max loadings as they do not seem much faster than factory loadings? I do see it's out of a 24" barrel.

I see most people's reloads are faster than this.

I'll start low and work up but I was wondering if the data below is on the conservative side.

If there is some more complete data for the Accubond with Win brass please let me know.





Barrel Length: 24"
Case: Winchester
Primer: Winchester LRM, Large Rifle Magnum
Trim Length: 2.610"
Twist: 1:10"

Bullet Weight180 GR. NOS E-TIP

Starting Loads Starting Load: Minimum load required. If a starting load is not populated, it often denotes a subsonic load.
Maximum Loads

Manufacturer
Powder
Bullet Diam.
C.O.L. C.O.L.: Cartridge Overall Length


Grs.
Vel. (ft/s) Velocity: The speed of the bullet in flight.

Pressure Pressure: The force exerted by burning powder measured in Copper Units of Pressure (CUP) or Pounds per Square Inch (PSI).


Grs. Grains: If the value is followed by a C, it denotes a compressed load.

Vel. (ft/s) Velocity: The speed of the bullet in flight.

Pressure Pressure: The force exerted by burning powder measured in Copper Units of Pressure (CUP) or Pounds per Square Inch (PSI).


180 GR. NOS E-TIP
Manufacturer Hodgdon
Powder H1000
Bullet Diameter .308"
C.O.L. 3.340"
Starting Load
Grains 74.6
Velocity (ft/s) 2,821
Pressure 53,300 PSI
Maximum Load
Grains 79.4C
Velocity (ft/s) 2,984
Pressure 62,400 PSI

Barrel Length: 24"
Case: Winchester
Primer: Winchester LRM, Large Rifle Magnum
Trim Length: 2.610"
Twist: 1:10"

180 GR. NOS E-TIP
Manufacturer IMR
Powder IMR 7828
Bullet Diameter .308"
C.O.L. 3.340"
Starting Load
Grains 68.4
Velocity (ft/s) 2,811
Pressure 52,700 PSI
Maximum Load
Grains 73.5C
Velocity (ft/s) 2,995
Pressure 61,600 PSI

Barrel Length: 24"
Case: Winchester
Primer: Winchester LRM, Large Rifle Magnum
Trim Length: 2.610"
Twist: 1:10"

180 GR. NOS E-TIP
Manufacturer Hodgdon
Powder H4831
Bullet Diameter .308"
C.O.L. 3.340"
Starting Load
Grains 66.8
Velocity (ft/s) 2,770
Pressure 53,300 PSI
Maximum Load
Grains 71.8C
Velocity (ft/s) 2,938
Pressure 61,900 PSI

Barrel Length: 24"
Case: Winchester
Primer: Winchester LRM, Large Rifle Magnum
Trim Length: 2.610"
Twist: 1:10"

180 GR. NOS E-TIP
Manufacturer IMR
Powder IMR 4831
Bullet Diameter .308"
C.O.L. 3.340"
Starting Load
Grains 67.3
Velocity (ft/s) 2,817
Pressure 54,500 PSI
Maximum Load
Grains 70.2C
Velocity (ft/s) 2,916
Pressure 59,700 PSI

Barrel Length: 24"
Case: Winchester
Primer: Winchester LRM, Large Rifle Magnum
Trim Length: 2.610"
Twist: 1:10"

180 GR. NOS E-TIP
Manufacturer Hodgdon
Powder H4350
Bullet Diameter .308"
C.O.L. 3.340"
Starting Load
Grains 62.1
Velocity (ft/s) 2,730
Pressure 52,300 PSI
Maximum Load
Grains 66.8
Velocity (ft/s) 2,916
Pressure 62,600 PSI

Barrel Length: 24"
Case: Winchester
Primer: Winchester LRM, Large Rifle Magnum
Trim Length: 2.610"
Twist: 1:10"

180 GR. NOS E-TIP
Manufacturer IMR
Powder IMR 4350
Bullet Diameter .308"
C.O.L. 3.340"
Starting Load
Grains 64.7
Velocity (ft/s) 2,797
Pressure 53,200 PSI
Maximum Load
Grains 68.1
Velocity (ft/s) 2,932
Pressure 60,500 PSI

 

[el matador]

Yeah that data does look a little conservative. Nosler has a really good data center on their site although it usually tends to be conservative as well. But it gives you a good idea of where to start and is useful for comparison. They don't list H4831 for 180 grain bullets but they do list IMR 4831 which is very similar. Max loads with each are going to be within 1-2 grains of each other so you can use the same starting data without having any trouble.

 

[excaliber]

I have that data also and noticed they said H1000 was the most accurate powder they tested with the Nosler brass and 180 gr bullets. From what I've read, H1000 is better for heavier bullets and that's the consensus here too.

I guess I'll just start low and work up.
Thanks

 

[Lefty7mmstw]

Yeah that data does look a little conservative. Nosler has a really good data center on their site although it usually tends to be conservative as well. But it gives you a good idea of where to start and is useful for comparison. They don't list H4831 for 180 grain bullets but they do list IMR 4831 which is very similar. Max loads with each are going to be within 1-2 grains of each other so you can use the same starting data without having any trouble.

I'd say you will be safe using I4831 data for h4831, but not vice versa... h4831 is around the same burn rate as 7828, which as you can see needs a few grains more powder to get to top velocity. The 4895's and 4350's can be cautiously used interchangeably but I wouldn't interchange the 4831 data.

I've burned a few #@ of h1000 with 180's and you can usually expect sub moa accuracy and 3100 fps or so in a 24" or longer 300win.
You may also have very good luck with rl22 in your 300win; I've burned a few kegs of that in my 300win's with 165gr and heavier bullets.

 

[fmajor]

When I reloaded for my 300Win (about 20 years ago.....), it *really* liked RL22 and I found the accuracy node at (iirc.....) 71.4grs though using SMK 190's.

If I were starting to reload for another 300Win today, I'd be looking long and hard at H1000 or 7828SSC or even possibly Retumbo, though it may be a bit too slow. Pragmatically, the barrel will dictate which powder/primer/brass is best given your specific primary criteria - be it most accurate? best hunting bullet?, etc.

I did use Fed215 primers and Winchester brass and still have all 500 original cases of which 300 are unfired (all of which will be used for a 7mm/300Win build).