300 Fireball and 300 Whisper reloading references on the web
 

Please help me compile a list of references specific to ammo and reloading issues as they relate to the 300 Fireball and 300 Whisper here.

My 300 Whisper pages:

Forming 300 Whisper Brass

Sub-Sonic Loads

Supersonic loads

Other Web Resources:

Accurate Reloading 300 Whisper page

Reloaders Nest 300 Whisper page

THE LONG WHISPER by Todd Spotti - An excellent overview of the 300 Whisper with loads!

new reload data
 

To all those that may be intrested.

I just posted some new reload data on:

reloadersnest.com

using W296 and 180g sierra boatail bullets

Question for the moderator

Do we want to list reloading data on this forum?

Not the moderator a new guy
 

Yes please. We all know the risks of irrespsible relaoding.

The 300Whisper is a wildcat and has its learing curve. I would like to consider the collective experience of a group to make the best choice.

Bill

It will be some time before I get a rifle together (Mostly depends on DPMS). But I plan on trying out VV N133 with CCI #450 or Remmington #6 1/2 primers and SMK 240gr HPBTs. Obviously this is a slower powder than N110. The real issue for me is burn consistency and any relationship between burn rate and energy density.

The most obvious risks are:

* too much chamber pressure for desired MV (~1050 fps)
* bullet not making it to muzzle

There was a really good picture on the Internet for that second case where a .30 cal bullet was hanging out of the muzzle of a barrel. But my Google voodoo was lacking in locating that photo.

And of course even if I make a workable load that is also consistent and groups well doesn't mean that it will be a safe load to shoot for anyone.

I'll post if I get such a load working. But I won't post what the load is if a single person objects.

Like others, I think we need to start pooling reloading data - would another specific reloading DATA forum (or sub forum like they use on Sniper's Hide) work?

I use this resource alot for comparing comparable powders between brands...

http://www.reloadbench.com/burn.html

Fudmottin:

I'd like to hear how that load works out. From a mock up of that round to reach those speeds you will be at 100% powder capacity. Given that you will only reach ~80% burn rate it may be asking alot to control muzzleflash or contain in a suppressor.

300 Whisper load
 

Anyone care to share some good subsonic data using 200gr bullets? Out of a 16 1/2" barrel? Surley some of you have some tried and true data for a new whisper shooter. 200's are alot cheaper than the 220's and 240's. I will probably try them all sooner or later but would like to give the 200's a good run first and be able to stay low and slow.

I am using 9.2gr Lil-Gun with Speer 200gr SP out of a 10 1/2" AR. and 9.5gr Lil-Gun with 220gr RN

Don't go passed the Lapua 200 grain subsonic bullets too. Very effective FMJ.

However, 240s sing at 1040fps in a way that 200s do not.

Subsonic Loads - I have just completed testing of loads out of my Model 1 Sales AR-15, with the following results;

Sierra 220 BTHP W296 - 10.5 gr. Exceeded 1100 fps, occasionally failed to cycle
Sierra 220 BTHP H-110 - 10.9 gr. Exceeded 1200 fps - functioned well
Sierra 220 BTHP 2400 - 8.7 gr. Velocities below 1070 fps - ejected empties, but would not load new rounds
Sierra 240 BTHP H-110 - 10.9 gr. Exceeded 1200 fps (average 1251 out of 5 shots), bolt would pick up a new round but usually did not have enough energy to go completely into battery (used forward assist).

I'm going to try some AA #9 now with the 220's, and try the W296 with the 240's. I was surprised that identical powder charges (10.9 gr of H110) produced higher velocities with the heavier bullets - somewhat counter to what usually happens.

Miker