Hot Rod 6mm.....which one?!?!

[xswanted]

xswanted,

Did you ever settle on a round?

I did a lot of research a couple of years ago on the 6's. What I wanted was a 105 class bullet at above 3000fps. Now there are a pile of different 6's that will do this. I wanted something easy, so it took the AI's out, because i didn't want to waste money on components and barrels before I can even have fun. Lots of good ones out there, do the research. Right now if i were going to do it all over again, i'd probably go with a 6 Competition Match or a 6SLR.

But I would probably do the SLR again because it's just so darn easy and fun to shoot. Fireforming just isn't fun.

xdeano

I haven't yet...I think I'm more undecied now than when I started this.

I'm thinking that a 6-250AI would be pretty darn cool, but really not doing anything there the 6SLR can't do I suppose.

I hate it when I can't decide what gun to build!

 

[Dgd6mm]

I love my 6CM's, fire forming is not a big deal at all. Plus the 6CM is accurate enough to be competitive while doing f.f. If you are looking for pure simplicity, go with the 6SLR. I do not own one, but would if I did not like the 6CM as much as I do. They both are very accurate for many rounds. My 27" at 600 yards still shoots .4 MOA. with 3900 rounds down it. I run a 115 DTAC at 3153 fps. using 48.7 grs. of H-1000. OAL is 2.875

 

[xdeano]

A 6-250ai sounds like a lot of playing around with brass. I dont think the 6comp would be to hard to make brass, just load and go and let the brass form itself. But the slr is just stupid easy to work with. The 6comp might have a slight edge on the slr velocity wise. I wouldnt be opposed it trying the 6comp after my 6slr goes south.

Xdeano

 

[tonysnoo]

Xdeano-
For me my pet load was always H4350 & 107smk's @ 3120' great midrange load with es's of 8-15. Spent way to much time with the 105 hybrids and numerous combinations of everything and while it was fast with very low es's, the vertical and grouping just wasn't equal to the 107's with this particular barrel. got hold of some bare Dtac's and loaded them up with H1000, H4831sc, H4350. 4831sc @3010' was a eye opener. Shot a bit flatter at 600 and es's of 5-8' and excellent vertical and grouping. Will start out this year shooting that load at 600 if I can find some more bare 115's. Don't have a borescope and don't want to look as the velocity is holding and it still shoots! If it ain't broke don't go looking Eric in DL

I have a buddy who shoots the naked DTacs in his SLR too very, very well! He is running them slower. My SLR seems to like the hybrids, just a touch better. The only bullets it didn't really care for were VLDs. I've been watching Nomad threads and it blows me away how fast he is running his SLR.

Been also having a lot of fun with my new 6 fat rat, but it's a lot slower than the SLR.

 

[Nomad47]

Just shot my 6SLR Monday and yesterday with an Erik Cortina tuner on the muzzle brake. One three shot group measured .062". Another measured .103". And a 7 shot group shot at 550 yards had 1.393" of vertical. Another four shots measured with a MagnetoSpeed chronograph had a MV of 3184 and an ES of 18. IMR 7828 ssc powder, BR-2 primers, 105 hBN coated Hybrids. 28" 8 twist Bartlein 5R barrel chambered by Preacher.

 

[xdeano]

Nomad, what's the charge weight and distance off the lands? Sounds like you've got a good shooter too. They are an easy round to get shooting.
Xdeano

 

[Nomad47]

Nomad, what's the charge weight and distance off the lands? Sounds like you've got a good shooter too. They are an easy round to get shooting.
Xdeano

44.91 grains (I accept either 44.90 or 44.92 grains as read on my GemPro), .020" off the lands. Don't forget, hBN coated bore and bullets.

 

[xdeano]

Nomad,

Thanks for the info. how is 7828ssc over a temp spread?

I've also looked at Retumbo 46grn to 50grns (105grn missle). Looks like it would be better velocities yet with lower presures. I'm running .020" off also, seems like the sweet spot for my rig. I'll have to give it a try when it warms up a bit. I'll have to run it through QL tomorrow.

Sorry OP, i've kind of derailed your post, but it's all good info to absorb.

xdeano

 

[Nomad47]

7828ssc is definitely more temp stable than the Reloder powders, probably not quite as good when compared to the "extreme" series of powders.

 

[xdeano]

Did some numbers and i'd have to run 50.5grn of Retumbo to hit the node in my 24" barrel. Velocity was in that 3100fps range. So i filled up an empty case with 50.5grns and it's right about the middle of the neck. I'm using a 6" drop tube and spin fill. I might play around with it, work my way up.

That's what I was thinking on temp sensitivity, it can't be to bad though.

xdeano

 

[Dgd6mm]

When I was running 49.0 gr. of H-1000 in my 6CM with a 115 DTAC it was running 3225 FPS in my 27" Krieger. My vertical at 1028 yards was 6.5 inches. I dropped 3 tenths and it shrunk down just under 4.5" and the speed came down to 3153 fps. This was before I started shooting the pointed DTAC.

Man those 6SLR's sound interesting. Does anyone make a 6SLR pre-fit yet?

 

[xdeano]

dgd6mm,

Those velocities are intreging. I might have to give it a try on my next tube. I just wish the neck was a bit longer. But with those velocities and having the barrel last so long, there isn't anything to be afraid of.

Between the SLR and the CompM you can't go wrong.

xdeano

 

[Nomad47]

When I was running 49.0 gr. of H-1000 in my 6CM with a 115 DTAC it was running 3225 FPS in my 27" Krieger. My vertical at 1028 yards was 6.5 inches. I dropped 3 tenths and it shrunk down just under 4.5" and the speed came down to 3153 fps. This was before I started shooting the pointed DTAC.

Man those 6SLR's sound interesting. Does anyone make a 6SLR pre-fit yet?

Don, no pre-fits yet that I'm aware of. Preacher chambered a 6SR pre-fit for me on a Bartlein barrel. He had to turn down the first 12" or so until the Savage barrel nut diameter met the taper of the Bartlein (the Bartlein was 1.250" at the chamber end). I hope that made sense.

 

[lh leggtowner]

I think I have learned more tonight about the 6mms than I have on any other thread. I am having a 280 Remington AI built by Meredith rifles. I think now the next one is going to be a 6mmSLR. Looked it up and it seems to be a awesome round. Hey Tooter order me a new stiller!
You guys have thrown a lot of information out there. The SLR seems to b easy to make from .243 brass. I am wanting more of a varmint / long range shooter. Good luck with your build and your decision. A friend of mine just picked up his 6x47 not fired any rounds. I believe the SLR will have a little more umph.

 

[Nomad47]

Yes, the 6SLR is easy peasy to form from 243 brass. Just run thru the die and shoot. After running thru the die, the shoulder/body junction is very slightly rounded, but after the first firing it is nice and sharp. At least that was the case with the PRVI brass that I used for my 6SLR.
When I get my new 6SLR, I will be using Winchester brass and I will see if there is a difference.

 

[savagedasher]

If you want a hot rod 243 Jody smokes Larry

 

[Dgd6mm]

When I was running 49.0 gr. of H-1000 in my 6CM with a 115 DTAC it was running 3225 FPS in my 27" Krieger. My vertical at 1028 yards was 6.5 inches. I dropped 3 tenths and it shrunk down just under 4.5" and the speed came down to 3153 fps. This was before I started shooting the pointed DTAC.

Man those 6SLR's sound interesting. Does anyone make a 6SLR pre-fit yet?

Don, no pre-fits yet that I'm aware of. Preacher chambered a 6SR pre-fit for me on a Bartlein barrel. He had to turn down the first 12" or so until the Savage barrel nut diameter met the taper of the Bartlein (the Bartlein was 1.250" at the chamber end). I hope that made sense.

Thanks Nomad for the info.
xdeano, I personally do not believe that the lenght of the neck makes a difference using the extruded powder like H-1000. I do like the lenght of the neck on the 6SLR. But when they build off of a .243 case we can't have it all, wish we could.

 

[GSPV]

6-6.5x47L or Dasher.

 

[xdeano]

Thanks Nomad for the info.
xdeano, I personally do not believe that the lenght of the neck makes a difference using the extruded powder like H-1000. I do like the lenght of the neck on the 6SLR. But when they build off of a .243 case we can't have it all, wish we could.
[/quote]

dgd6mm,
There is no imperical data that either one of us is right, so i'm not going to argue with you on neck length, but i do think there is something there. I just like the flexability of having the lenght of the neck, it gives me that warm fuzzy. haha

Have you ever used retumbo in the 6Compmatch? I've looked at trying it in the SLR, but i haven't gotten around to it.
xdeano

 

[2000yd]

6mm-06 imp lapua brass