This is not only a match made in heaven for your 300 Blackout rounds, but they will also do very well with a variety of rounds that are mostly designed for varmint hunting. I had never heard of this caliber until a shooting club buddy of mine in Paraguay begged me to bring him a 10 inch SSK 300 whisper barrel for his Thompson Contender back in 2000. They recently published updated and expanded data for the .300 AAC Blackout caliber getting into more subsonic and heavier grain weight data; two areas that are typically lacking for …

.300 Whisper / .300 AAC Blackout / .300 Blackout (Hodgdon Data) reloading data with 73 … Parameters of the Test Sierra .300 Whisper Loading Data - Free download as PDF File (.pdf), Text File (.txt) or read online for free.

I won’t address the gallery load, as normally, the velocity is a bit higher on these. Simple solution… reload! Cartridge cases can be formed from existing .223/5.56 cases, by cutting on a bandsaw, trimming and full-length sizing.

He took a small cartridge –the .221 Fireball –blew it out to .30 caliber and, using heavy bullets, turned it into an accurate round that did some neat stuff.

(The ballistic performance similarity.)

It was based on the .221 Remington Fireball case necked to .30 caliber and had an overall length of 2.260 inches - same as the .223 Remington - allowing it to function in the AR-15 rifles and magazines.

Velocity is a very …

.300 Whisper Load Data Handloading the .300 Whisper and AAC Blackout is no different than most other bottleneck rifle rounds. Brass is readily available, so tediously reforming .223/5.56 cases is no longer necessary. Jones of SSK Industries began developing a wildcat cartridge (at the request of US military Special Forces) that became known as the .300 Whisper. NOTE: Data Sources: Hodgdon, Western Powders, Lee Precision, Sierra.

Read All NOTES below. 11 grains is sufficient to cycle the action. 300 Ruger Compact Magnum (RCM) Load Data; 308 Norma Magnum Load Data; 30-06 Springfield Ackley Improved Load Data; 300 Rem Short Action Ultra Magnum Load Data; 300 Holland & Holland (H&H) Magnum Load Data; 300 Winchester Short Magnum (WSM) Load Data; 300 Winchester Magnum Load Data; 300 Weatherby Magnum Load Data; 30 Nosler Load Data Post by TNFrank61 » Sat Jan 17, 2015 3:00 pm I already have 4 loading manuals, 5 if you count the Lyman Cast Bullet Handbook and if I were to buy another it'd probably be the Nosler since it's one that I don't have. In either loading, the .300 Blackout and Whisper do not use much powder per shot, so if you reload, powder costs are about as small as they get. So if you're a hunter looking for a powder to load rounds appropriate for this kind of hunting, the … dimensions and performance, including the proprietary 300 Whisper®, the 300 Fireball and the 300-221. Well, there is not much extensive data for reloading either, but Sierra Bullets is trying to help change that. So, being the cautious guy I am, I started my load at 11 grains of H110. We’ll be using a load of 28.4 grains of Winchester’s 748 powder. 300 WHISPER. .300 Blackout Loads for a Bolt Rifle Whisper to Blackout CSharles E. Petty ome years ago I spent some time shooting with J.D. The photo shows a 300 Whisper loaded with a Berger 125, with a Sierra … This entry was posted in Load Data, Reloading and tagged 300 AAC Blackout, 300 BLK, 300 Fireball, 300 Whisper, Advanced Armament Corp., blackout cartridge, Remington, wildcats. Instead, I’ll try and look at the true “whisper” loads (sub sonic) and see how silent and accurate they really are. Jones’ criteria for the .300 Whisper cartridge were demand-ing to say the least. There’s no real good load data for 300 BLK yet for the bullet weights I’m using, so since 300 Whisper is a lower pressure load one assumes it to be safe to use interchangeably. This is offset by the greater cost of the bullets, as a 240-grain .308 jacketed bullet is going to cost you more than a 230-grain lead bullet for a .45 ACP. Bookmark the … Te c h n i c a l l o a d i n g b e n c h Ma y 2008 aM e r i c a n rifle M an P rolific wildcatter J.D. The '.300 Whisper', a CIP standard, is one of many cartridges designed to shoot heavier bullets (200–250 grains) at subsonic velocities..300 Whisper is also known as .300 Fireball or .300-221.The 300 AAC Blackout is the most successful 30 caliber cartridge with these design parameters and been widely accepted whereas the .300 Whisper has fallen into disuse. If I had it to do all over again, I would have only bought 1 in 8 twist barrels as mine seem to shoot super sonic as well as the slower 1 in 10 twist barrels.

Re: Hornady 8th Edition Manual, 300 Whisper data for 300 Blackout?

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