upper velocity limit 300 wtf?
 

What kind of top end velo's are you guys getting with your wtf's?

2300fps out of a 16"

130gr 30-30 flat points at 2250fps out of a 16" barrel with no excess pressure signs. Pretty consistant load, decent accuracy and devastating on water jugs at 100yds. (the 220gr subsonics just punch straight through the jug).

110gr 30 carbine tracers at 2500fps

100gr round nose plinkers at 2600.


Frank

5 shot average of 2232 out of a 10" with 110 V-max. Primers were flat, so backed it down to 2050 fps. No pressure signs at 2050, brass should last for a while.

2800 fps using Remington Accelerators at 47000 psi, Accurate #9, 16" AAC Rem 700 barrel. They should work with AR-15 too but I haven't tried it. Those are 55 grain .224 bullets in .308 polycarbonate sabots. DON'T SHOOT THEM THROUGH A MUZZLE BRAKE OR SUPPRESSOR!

I was just playing around to see what they'd do. I see no use for them or for any supersonic 300wtf loads for that matter. For supersonic 30 caliber ARs I have an LR-308 and an LR-30S. The 30 Rem AR and 7.62x39 seem to me to be better choices than any 300wtf for a supersonic 30 cal AR-15 but I don't own either. The ballistic characteristics (wind deflection and retained energy) of low supersonic light 30 cal bullets are poor compared to similar weight bullets for the 6.8 SPC and 6.5 Grendel.

speed
 

2250 125 gr nos ballistic tip and H110 , 18.5 grains I think. Gun and reloading notebook is in VA and I am in Uruguay hunting

forgot
 

Encore SSK 26 inch barrel

3200 fps with 16 inch barrel and 55 grain bullet and sabot.

2150fps with 110gr V-Max in a 10.5" bbl

My "engineers" and I are playing with a cartridge that does everything a whisper does...and we've hit 2650 with 125's.
Seems to feed real well on the AR-15 platform.

It will be a lot less confusing to new people if you just use the proper name, 300 AAC BLACKOUT or 300 BLK. Or if you mean specifically 300 Whisper(R) then that is fine also.

Blah I think 300/WTFever is perfect.

I have no doubt you achieved that velocity. A Quickload calculation says it takes a chamber pressure of about 65000 psi to do it. Accurate #7 was Quickloads powder choice. Could you tell is the details of your 3200 fps load?
Projectile weight (bullet +sabot)
Seating depth of the sabot. (to give chamber capacity)
Powder type and weight.

What do YOU consider a maximum working presssure for the 300 BLK in a Rem 700 action? I would not expect 65000 psi to cause damage considering much larger cartidges have that as their SAAMI max presssure. Is there anyting about the 300 BLK to argue against that other then the chance of the cartridge ending up being shot in weaker firearm.

All of our guns including ARs are shot with 72,000 psi proof rounds.

I don't intentionally load past 55,000 psi for normal use.

Do they make those sabbets for 6mm bullets?


swampf0x

No. You can get 50 to 30 cal sabots though.

Do you mean .30 cal sabots that use 6mm bullets or 6mm sabot casings for smaller projectiles?

30 cal sabots that use 6mm bullets. If this were possible, I could get some pretty good speed from the 300 blackout and be able to reach out a bit further and still be legal for deer hunting.

swampf0x

Not sure I'm tracking with some of this. If your gonna fire a sabot round in the 300Blk out why not just build a 221 Fb and use it or shoot the 5.56? I went through this to be able to get .308 round down range stealthfully.:grin:

I will use my 300wtf primarily as a stealth deer hunter. BUT, it would be nice to send a (deer) bullet down range from the same rifle at 308 speeds. A saboted 6mm in the 300wtf case may do that. I know the 300wtf can be loaded supersonic but it's top speed would be around 2300fps. With a sabot and smaller bullet you can get greater velocity say around 2600fps -2800fps. This new cartridge from Spook will accomplish this task without using a sabot...................Even better.


swampf0x

Saboted sub-caliber bullets in rifled barrels are known for high velocity, not for high accuracy.

Perhaps for the 300 WTF, but the 300 AAC BLACKOUT will do 2400+ with 110 grains from a 16 inch barrel at normal pressures.

Yes the wtf will too most shoot 125's and thats probaly what he was referring to, the covert will reach that with a 11" and 125's fyi :)

What kind of accuracy are you guys getting using the sabots?

swampf0x

I played with some in a 308 win a while back with 55, and 68 and got around 4" @ 100 yds