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Thread: 300 Blackout bende
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29-12-2016, 19:37 #11
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Re: 300 Blackout bende
I measured it using my cleaning rod, several times - I could be wrong though...
To be honest, the twist rate was a bit of a shocker to me - I only noticed this once I got it, but it is what it is...
Need to put an item on the 2017 agenda - motivate Frontier to produce a range 110 / 120gn CMJ projectile :)
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29-12-2016, 19:50 #12
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30-12-2016, 06:45 #13
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Re: 300 Blackout bende
I suppose CMJ bullets will be cheaper than the Range Masters they currently have?
Otherwise the 125gr Range Masters will be just about perfect for target shooting or for standardizing on for supersonic applications.
http://www.frontierbullets.co.za/pro...al-125gr-btsp/
I am not aware of any other current source for 123 - 125gr FMJ bullets at fair prices, unless the S&B importers may be persuaded to bring in such bullets with the next shipment.
If Frontier could then be motivated to also include a 125gr Spartan Hunting Bullet, that would be awesome, since then the guys with the bolt actions who are using their guns for hunting / target shooting / plinking interchangeably, should be relatively close for purposes of load development and point of impact between these bullets...
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30-12-2016, 06:47 #14
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Re: 300 Blackout bende
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30-12-2016, 06:50 #15
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30-12-2016, 06:55 #16
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Re: 300 Blackout bende
I got a bunch of cases from Nobletec to start off with - they are stamped JG 5.56 at the back. They came primed so had to unprime them when preparing them. Had to open up some of the flash holes a bit, but otherwise they were 100%.
As far as I understand Nobletec is also now looking at turning out 300 BLK rounds, since there is another shop that will be bringing in some 300 BLK rifles in the new year, and the demand for ammo is obviously growing.
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30-12-2016, 06:58 #17
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30-12-2016, 07:00 #18
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30-12-2016, 07:11 #19
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Re: 300 Blackout bende
I basically agree with you, for all practical purposes of the intended application.
Interesting to think that the 300BLK was developed to work on short barrels (from say 9 inches), whereas the original M16 and the intention behind the .223 / 5.56 was the use of barrels in the region of 20 inches. https://en.wikipedia.org/wiki/M16_rifle
This piece of information is still a very good summary of the theory and background of the development of 300 BLK, and makes for good reading material, for all the newcomers to the cartridge:
http://dtic.mil/ndia/2012armaments/W...590Silvers.pdf
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30-12-2016, 07:43 #20
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Re: 300 Blackout bende
It's a factor of case fill. There is quite simply no space in the case to stuff in enough powder to allow it to burn for more than 9 or 10"... therefore a longer barrel is totally superfluous, and will eventually lead to the bullet slowing significantly as soon as the gas port starts drawing off pressure.
Even in the closed action of the pump-action Troys (so only uncorking the pressure chamber once the projectile exited the muzzle at 16") there was no significant increase in velocity."Always remember to pillage before you burn"
Unknown Barbarian
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