Anyone have a very recent load manual w/ .300 blk data?

[CJ]

I'm trying to create a load for .300BLK that uses nothing but surplus parts.

Surplus .223 case, surplus M80 147gr FMJ projectile, and some Alliant 2400 powder. If anyone has a recent manual, or even load data for .300 whisper I'd like to see it. Need a place to start.

I believe I should start between 12.9 to 15.7 gr. but if I could get some solid data that would help me from going to the range more than once.

[dee]

I can look when i get home but I'm pretty sure the 300 Whisper data is gonna be for a TC Contender so that powder may not be listed.

[GSXRK5]

I have the Lyman and Hornady at home I can check when i get home.

[CJ]

Thanks guys, any info would help me out.

[dee]

Hornady's 8th edition has data for the Whisper with a 10" barrel pushing the 150-155 gr bullets at
12.9gr@1500
13.7gr@1600
14.2gr@1650 Max
Sierra's 5th edition also has data for the Whisper but in a 10" TC as well.
13.4gr@1400
14.1gr@1500
14.8gr@1600
15.7gr@1700Max
My Nosler book didn't list either round so no luck there.

[CJ]

Hornady's 8th edition has data for the Whisper with a 10" barrel pushing the 150-155 gr bullets at
12.9gr@1500
13.7gr@1600
14.2gr@1650 Max
Sierra's 5th edition also has data for the Whisper but in a 10" TC as well.
13.4gr@1400
14.1gr@1500
14.8gr@1600
15.7gr@1700Max
My Nosler book didn't list either round so no luck there.

I assume this is Alliant 2400 powder? Seems like the data I got is almost identical to this, I'll load to 14.0 and see how it does. Geez 147gr has shit velocity, stupid small case capacity.. oh well it's my plinking load so no big deal. Thanks a bunch for typing that out.

[dee]

Yea that's Alliant 2400, the velocity sucks thanks to the 10" barrel they used but if you're going SBR it should be about the same. You might look at a burn rate chart and see if there is a Hodgdon powder that's close and check their website data as well.

[CJ]

Yea that's Alliant 2400, the velocity sucks thanks to the 10" barrel they used but if you're going SBR it should be about the same. You might look at a burn rate chart and see if there is a Hodgdon powder that's close and check their website data as well.

.300 isn't like a normal caliber, the difference between a 10" barrel and a 20" is like 80fps. It doesn't have the case capacity to see any benefit from longer barrels. That's why it's designed for short barrels. .300 uses magnum pistol powders instead of rifle powders because of this. If you put IMR-4198 or 4895 behind a .300 bullet you'd get a huge ass fireball and like 1100fps.

[dee]

Sounds right given the surface area of the bullet.

[CJ]

Sounds right given the surface area of the bullet.

So, really .300 blk is primarily for suppressed SBR's, building hunting rifles out of them is a little questionable... what's the point of a larger caliber if it essentially delivers the same energy as a .223? Sure you can load a 110gr projectile but it's only going to go 2000, maybe 2200fps?

[bottlerocket]

So, really .300 blk is primarily for suppressed SBR's, building hunting rifles out of them is a little questionable... what's the point of a larger caliber if it essentially delivers the same energy as a .223? Sure you can load a 110gr projectile but it's only going to go 2000, maybe 2200fps?

From what I gather its because even though it has the same energy, the 30 cal will stop inside your target and expand faster instead of punching straight through like a smaller 22 cal bullet

[dee]

I know Sierra makes 300 specific bullets but does anyone else? I assume they offer them to help meet the required OAL but can you just use any .308" diameter bullet effectively?

[CJ]

From what I gather its because even though it has the same energy, the 30 cal will stop inside your target and expand faster instead of punching straight through like a smaller 22 cal bullet

The larger the mass the more force is required to expand.