silencertalk wrote:Why bother when 300 AAC BLACKOUT is out?
300 AAC BLACKOUT brass can be made from 223 brass, and there is factory subsonic.
There are some places in the country where you can NOT hunt with stepped down rifle cartridges. You CAN hunt with 30 Carbine because it's strait walled.
Just saying. There are SOME areas where this would make sense for some.
silencertalk wrote:I have not verified 2000 fps from a 7 inch barrel, but it should work at 55,000 psi with H-110 powder and a 110 grain bullet - in a real 300 AAC BLACKOUT chamber.
I think that may be pushing it. If I seat a 110 V-max on 17 grains of 2400 (faster than H110), I get 1950 fps in a 10" barrel. I could get 2000 fps, but the load would be compressed and I would have flat/dimpled primers. This is with a 300 Blackout chamber. The faster burn rate of 2400 is probably a better match for barrels 10" and under.
The powder which gives the most velocity in a normal barrel length is probably the same powder that gives the most velocity in a very short barrel. This is because peak chamber pressure - the limit of how much powder you can use, is reached when the bullet has only moved less than an inch.
The Remington 123 grain factory ammo does 2100 in a 9 inch so 1950 fps in a 10 inch seems way slow for 110 grain.
Is this actuall chronograph velocity, or is it how remington usually does (Ie. .30RAR) where the box says one velocity and the actuall velocity is about 300fps slower? Im assuming you have actually chrono'd the factory ammo extensively.
Regards,
Aaron Fouraker
Co-Owner
Delta Company Arms, LLC
(918) 332-6503 [email protected]
www.deltacompanyarms.com
IN GOD WE TRUST.
I was simply wondering why 30 carbine would be a bad option. It's a straight walled cartridge so I assume with carbide dies no lube would be needed. Since it is not a brand spank'n new cartridge there may be deals to be had on brass and reamers and dies. The slow twist standard barrel is certainly a big strike against 30 carbine since it would mean a custom barrel. Mostly I was just kicking the idea around and thought maybe I could get a straight answer instead of just a line-up of 300 Blackout cheerleaders. It very well may be that 300 blk is the best choice, but I was curious why it would be better other then the obvious availability of factory subsonic ammo and factory chambered rifles. ( I realize these are not small considerations)
I have a pretty good supply of .308 bullets, and as of yet, no brass/dies/guns for any of these options, so this was simply a fact finding mission....I had/have no other agenda in asking my questions.
82nd airborne wrote:Is this actuall chronograph velocity, or is it how remington usually does (Ie. .30RAR) where the box says one velocity and the actuall velocity is about 300fps slower? Im assuming you have actually chrono'd the factory ammo extensively.
Ha. No. The Remington advertised velocity for 300 AAC BLACKOUT is actually the velocity is the loaded to on the press.
Fact is, the single biggest reason why published velocities are never achieved in the real world is because they test them in barrel lengths longer than anyone has.
To solve this problem, we made 16 inch the "standard" SAAMI barrel length for 300 AAC BLACKOUT.
82nd airborne wrote:Is this actuall chronograph velocity, or is it how remington usually does (Ie. .30RAR) where the box says one velocity and the actuall velocity is about 300fps slower? Im assuming you have actually chrono'd the factory ammo extensively.
The factory ammo is rated at 2315 fps, and Noveske chronoed it at 2340 and a govt user got 2360.