300 whisper load data

As an exercise in cartridge design, I dare you to design a cartridge that does what the Whisper and Blackout do, and doesn’t come so close to either that it would seem to be a duplication. 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. was aided in this work by the continuing efforts of rifle target shooters. All Rights Reserved. At the time, ARs were not on my radar, but working with a new and interesting cartridge was right up my alley. .300 Whisper Load Data Handloading the .300 Whisper and AAC Blackout is no different than most other bottleneck rifle rounds. So, J.D. You simply cannot push a (to use as an example) 168-grain .30 bullet and a 240-grain .30 bullet at the same speed. A subsonic 240-grain bullet is going to be going, at most, at 1,050 fps. If you look in the article you mentioned (the same I posted before) you'll see that velocities are the same for both 300 BLK and 300 whisper factory ammo, fired in guns with chambered for either rounds. Please don't dissect posts just to bash, it's a waste of time for us all. Well, they were for NRA High Power. We’re getting a bit involved here, so stick with me. In developing loads for this cartridge, some published data required an excessively compressed powder charge, which bulged the case body just below the shoulder when seating bullets, effectively ruining the case. Match. I have complete faith in my Lord. After experimenting with the Whisper for a short while, I moved on to other new and/or interesting rounds. 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. LPS resized to .308 . However, for all practical purposes, it is identical to the earlier .300 Whisper design. Brass is readily available, so tediously reforming .223/5.56 cases is no longer necessary. A shortcut would be to take the .221 Fireball case, and neck it out to .30. And those were pointed, match bullets. ©2020 Outdoor Sportsman Group. All Shooting Times subscribers now have digital access to their magazine content. As you can see in the chart, I tested quite a few handloads with bullets weighing from 110 to 200 grains. Sierra 240 grain (16 g) jacketed bullets work well if the barrel has a 1:8 twist. LOL, I've still got some 9x19mm loaded up with some Nosler 124gr HP's that I need to shoot as some Sunny D jugs that I've been saving up to see how it expands. 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. David Fortier talks with Jeff Hoffman of Black Hills Ammunition about the evolution of the .308 Win. The .300 Blackout was type-certified by SAAMI, and Remington and everyone else began making ammo. Each shot would travel about 10 inches into a gel block, and then the yawing bullet would veer to the top, bottom or sides of the block, and exit. This is good, because a longer and heavier bullet will have a larger ballistic coefficient, or BC. 175 Gr. Like situational ethics, standards of accuracy vary according to circumstances. I fired the iron-sighted Contender at 25 yards and the M&P15 at 50 yards to start, but after I'd fired 100 or so rounds in the rifle, I moved out to 100 yards and fired a few select loads. I wasn't into suppressed ARs, so I limited my experiments to lighter bullets traveling at supersonic velocities. The '.300 Whisper', a CIP standard,[1] is one of many cartridges designed to shoot heavier bullets (200–250 grains) at subsonic velocities. The M&P15's 1:7-inch twist rifling handled them just fine; however, the slower 1:10 twist Contender barrel wouldn't stabilize the heavier bullets, especially at subsonic velocities. Caribou Media Group earns a commission from qualifying purchases. To get started, click the link below to visit mymagnow.com and learn how to access your digital magazine. Match bullet. Awesome caliber i.m.h.o. When I began shooting in the early 1970s, the bullets available for .30 rifles for target shooting were not many. Formed by simply necking up the .221 Fireball case to .30 caliber, the .300 Whisper was designed so that it would launch heavy bullets slower than the speed of sound; there would be no "crack" caused by a sonic boom. Or living targets. In the early 1990s J.D. .300 Whisper description from AR15barrels.com, https://en.wikipedia.org/w/index.php?title=.300_Whisper&oldid=960145728, Creative Commons Attribution-ShareAlike License, This page was last edited on 1 June 2020, at 10:32. We ping steel with a .300 WinMag at over a mile. Editor's Note: This article is an excerpt from Cartridges of the AR-15, available at GunDigestStore.com. The special tapered expander die that came with those dies swiftly and smoothly reformed the cases. There are even .300 Blackout and Whisper loads that offer expanding bullets. 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. Brass is readily available, so tediously reforming .223/5.56 cases is no longer necessary. .300 Whisper is also known as .300 Fireball or .300-221. There were 180-grain soft points, and 220 FMJ or soft-point bullets, but they were round-nosed, and meant for use on large game. In developing loads for this cartridge, some published data required an excessively compressed powder charge, which bulged the case body just below the shoulder when seating bullets, effectively ruining the case. Distance is easy, as the targets are a known distance away, and that distance does not change. The end result was that the .300 Blackout and the .300 Whisper, for almost all concerned, were interchangeable. Firing in the .300 Whisper chamber results in a slightly sharper shoulder. You could probably load some heavies up with a small charge of trail boss for subsonic flight for a rifle length barrel. It wasn't a SAAMI standard round, and back then only CorBon offered factory-loaded ammo. This was in 2011, and life was good. V • SSP RELOADING DATA. Or, assuming you could find someone who didn’t already know about either, and who knew enough about cartridges, pose them this problem: a .30 bullet, as heavy as possible, in a parent .223 or .221 Fireball case, that has to fit an AR magazine, feed reliably and use an unmodified bolt. I have a 300 Whisper in a contender barrel. That platform was the M4, so the new cartridge had to fit into AR-15 magazines, and work with AR-15 bolts. The .300 Blackout is here to stay, and we take some time to look at new technology surrounding this cartridge. Then, controversy erupted. This site uses Akismet to reduce spam. A bullet with a higher BC loses less velocity as it goes downrange, so the net is not to lose as much when it reaches to the target. 300 Whisper SSP Test Specifications/ Components Firearm Used: T/C Contender Barrel Length: 10" Twist: 1 x 10" Case: 221 Remington (reformed) Trim-to Length: 1.355" Primer: Fed 205M Remarks: Few cartridges have a more Byzantine history than the .300 Whisper.

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