Introducing the .30 HRT.


The name was chosen to "give props" to the original developer of this "new" (HA!  ) wildcat. Simply put, it is the .30 Herrett RIMLESS, "made" by us at Teppo Jutsu. Dubbed Herrett Rimless Tactical, or HRT (which also by itself heralds back to Herrett). All you do is run 6.8 SPC brass into .30 Herrett dies, trim from 1.675 to 1.605 and done you are.

But WHY?
- 7.62x39 performance without those mag head aches (but now you have to use SPC mags)
- More case capacity than the 300 Whisper and should be able to function without an adjustable gas block.
- Something different
- 86 gr. pistol bullet through 240 SMK, as well as sabots....
- Something different
- brass should be easier to get than .221 Fireball, and cheaper too
- dies are "off the shelf", and pretty darn cheap

No, it is not the best thing since sliced bread. But it makes for another choice, and for those that have .300/221 uppers that don't run optimal, this is a simple rechamber that cleans up the old one and should make all loads run. The barrel is in the park tank, once out and installed I will test and see if my predictions hold true.  Factory loads are not available at this time, but we might be able to get someone crazy enough to load it for us (we have some options)

Suggested performance from a 16" barrel:
110 Vmax              2670 fps
110 Solid Spitzer  2660 fps
168 SMK                2010 fos
240 SMK               1040 fps desired, around 1500 fps feasible


For me, this was an ideal solution, using the MGI QCB upper with a 6.8 barrel/bolt/mag and then this barrel, to give access to whisper-like performance with only a 30-second barrel swap. And the two rounds will not fit in the other's chamber ... so that issue is taken care of.

Here is the mag shown with 7.62x39, 30 HRT with 110 Vmax and 240 SMK and a factory loaded 300 Whisper.

Thoughts?




ETA items to list re brass

Cool beans. I had a similar Idea to this a while back but it was based off the 7,62x39 case(with a 270 cal bullet much like the 6.8 but not really) never really did much with it though. Looks cool as hell though, and the ability to use the lighter pistol cal bullets is neat too.

WHEN WILL IT END?

So this can use a 7.62X39 bolt? Looks like a 7.62x39 with the case taper reduced, although a bit longer case. What would happen if you ran a 7.62x39 case through the 6.8 die, or is the case too short for this? Always thought a 7.62x39 with the case taper reduced and kicked out to .338 would be an interesting round.

Oh well, time to start thinking about another project, love something different!

Sounds neat. I like that it uses 6.8 SPC brass and mags.

Quoted: WHEN WILL IT END? So this can use a 7.62X39 bolt? Nope Looks like a 7.62x39 with the case taper reduced, although a bit longer case. Negative, 6.8 SPC brass What would happen if you ran a 7.62x39 case through the 6.8 die, or is the case too short for this?It would get stuck before bottoming out.  x39 brass is .447 at the base, 6.8 brass is .42 at the base Always thought a 7.62x39 with the case taper reduced and kicked out to .338 would be an interesting round. Tromix did a 338x39 and in the Dark Continent they use a similar one called the 338 Scorpion for culling herds (or poachers)  The Selous Scouts used a 7 x39 for improved performance Oh well, time to start thinking about another project, love something different!

Sounds like a good idea and seems like it should mimic the 300Whisper without some of the cost involved, or without having to trim the case so much. I'm tuned in for the update.

Is this using light .308 bullets?

Quoted: Is this using light .308 bullets?

Anything from 110 gr through 240 gr ....

Marty "The Selous Scouts used a 7 x39 for improved performance"

Please provide additional information. As a fan of Rhodesia, I am very curious here.

tsh77769

Quoted: Marty "The Selous Scouts used a 7 x39 for improved performance" Please provide additional information. As a fan of Rhodesia, I am very curious here. tsh77769

From source in Zimbabwe

The Selous Scouts used the AK round necked down to 7mm (no change in shoulder angle or any other change)during the rhodesian bush war.   The new barrels were fitted onto standard AK rifles except they were normally a couple of inches linger. Bullet weight used was 120grns.  Main advantage was vastly improved accuracy and better penetration through timber.