Range Report 6GT Project/Range Report

[verdugo60]

Part of the draw of the GT is that it is supposed to mimick the accuracy of the 6BR/Dasher family with it's short fat case and 40 degree shoulder angle but also overcome feeding issues associated with the BR by having a slightly longer body.

6x47's and 6 creeds are a bit more finicky so if the GT can do the hybrid thing between BR's and 6creeds it will be popular.

 

[verdugo60]

For sure. I was really skeptical about StaBall but I'm pleasantly surprised how it shoots. I hope it continues to shoot well and pan out to a larger node of accuracy bc I ordered a Redding BR-30 and I'm going to mount it on my 650. I'm interested to see if I can get a load that consistently shoots 3/8's out of thrown loads on a progressive. I'd also like to nail down a 6mm bullet feeder solution.

I definitely think this cartridge will shoot, it's just will it shoot under a wide range of conditions. I'm really surprised at the drama caused by shooting 4350 in it. It even proves to shoot well with it using Alpha brass. I guess people seem to think it's too finicky a cartridge to use a wider range of powders. I'm not sure that's the case.

The dream of a progressive "slop" load lives on, lol!

 

[MOshooter]

Honest question, how many guys actually have feeding issues with a dasher? I personally have not over multiple barrels and 2 different actions. I think this point is blown way out of proportion.
I'm not a debbie downer on the GT, if it had been available 3 years ago when I started with a Dasher, I probably would have skipped the dasher for GT.
Now that my well-used dasher brass is just about at the end of it's useful life, I'm strongly considering the GT as a replacement.

I was at this point as well. Im only 130 rounds deep into the 6GT but so far it is doing what I expected.

 

[Darkside-Six]

So I went out today and put another 40 rounds on the GT. Have exactly 100 rounds down the barrel. Shot 5 round groups of Varget every tenth of a grain from 34.4-34.9 with Berger 105 Hybrids, Hornady brass, and CCI 450 primers. Every single string grouped well and had single digit SD’s. The last group, 34.9 started to see a little bit of sticky bolt.

34.6 seems to be the sweet spot.

 

[Sheldon N]

BR because it could shoot 8208 decently and that powder throws well. Sure, it's not Varget...

I'd look into just doing it with Dasher and a 105, but running it lower pressure around 2820-2850. If I recall correctly I did that for a while with XBR and 105 BTHP with progressive loads. Shot 1/4 MOA and held an SD of around 7-8. Never ran it in a match but it was extremely capable.

 

[verdugo60]

I currently load 223 on the 650. It's a temp stable load that shoots 1/4 to 3/8's from bulk LC brass. 8208 and 75gr BTHPs. I currently load all my PR competition ammo on a 550. I don't lose any precision loading on a progressive in terms of priming, sizing, and seating. The vulnerability to precision is managing the components in bulk. Throwing powder, case prep, or dragging down your progressive speed by going back to the old truncated loading process on a single stage like priming your brass by hand before loading it in the 650, just for example. I've managed to do it with 223, think I can do it with BR or GT. BR because it could shoot 8208 decently and that powder throws well. Sure, it's not Varget...

I get pretty good precision doing the same on a Dillon 550, I don't have a single stage at all anymore.

I have noticed some variance in my shoulder bump by a few thousandths, not sure if I need to upgrade to the aftermarket shell plate to get rid of that or what. I was also paying attention to the Staball! Someone posted a video of a temperature test and it did vary by 60-70 fps if I remember right.

I'm interested in that 223 load, I might set a Tikka T3 up in a chassis as a trainer this year if I start shooting more comps.

 

[verdugo60]

 

[NorCal Vu]

Current round count log.

Did an accuracy test @ 1515 rounds this past Saturday. With a lil more throat erosion, I gave the DTACs another shot and found a nice load I will verify next range session.

112s are still hammering for me.

Fired 3, wind picked up. Dialed in .1 left, fired two more.

4 more of the same load above.

GT 2.0 (1:7 twist)

Broke in the barrel 25 rounds.
Zeroed, practice and shot a LR match: 100 rounds. 112s MB @ 2970fps. 8-3/8-4 2019
8-9-19 Load Dev Day 100 rounds

8/23/19 - 50 rounds @ 600yds


8-16-19 Load Dev and more testing of the 1:7 65 rounds

9-7 & 9-8-2019 - 100 rounds, long range match weekend.

9/20 - 9/22 - Steel Match weekend. 165 rounds

10/4 10/5 10/6 - 175 rounds.

10-13 - 10-14 Bakersfield Match - 220 rounds

10-20-19 Deep clean barrel and shot 50 rounds. Fouled barrel in, zeroed (moved scope), and tested a few seating depths. Pushed 112s out 35thou to stay 20 off the lands. 1050rds down the pipe.

11/2 - 11-3 Shot a light practice and Long Range Match. 85 rounds total.
1135 down the pipe and still hamming at distance.

11/17-11/18 - Club Steel Match weekend. 150rds.
1285rds total

11/23 - 11/24 - Tehama Steel Match and practice. 120rds
1405rds

12-6 - 12/7 110rds - NCPPRC SOTY Match
1515 rounds

12/14 Accuracy Test @ 1515 rounds.
Shot 45 rounds of various loads.
1560rds total.

 

[LawnMM]

Part of the draw of the GT is that it is supposed to mimick the accuracy of the 6BR/Dasher family with it's short fat case and 40 degree shoulder angle but also overcome feeding issues associated with the BR by having a slightly longer body.

6x47's and 6 creeds are a bit more finicky so if the GT can do the hybrid thing between BR's and 6creeds it will be popular.

Killing me smalls.

 

[verdugo60]

Killing me smalls.

Because you want one now? LOL.

 

[verdugo60]

@NorCal Vu, wow good shooting! How much throat erosion and how's your speed? Has it changed at all?

 

[trophyhunter]

Look up the 6SLR, etc. It was the "cure"
using H1000, to the 243's and 6 Creedmoors that were torching barrels in 1K rounds or less with Varget.

but the creeds & 243 were not running Varget, I don’t think anyone I know is running much else but H4350

and 6SLR was a joke, unless you ran a 32” barrel it never took off

 

[trophyhunter]

Why is 6SLR a joke? It does what a Creed does but better. Kind of like a Comp Match. It's hard to truly run a Creed at low chamber pressure because it doesn't quite have the capacity for slower powders like RL26 and H1000. The SLR does and you can truly run a DTAC at 3K with very low chamber pressure

Do you shoot it ? Have you ?
I tried it, nothing short of a long ass barrel got any speed. I could’ve achieved everything I found from a SLR without forming in a 6creed with a different powder.

it’s never taken off, how many people shoot it

 

[Darkside-Six]

Lol

 

[trophyhunter]

What speed were you trying to get? What powder were you using? Did you only shoot the one barrel?

I shot it for maybe half a barrel, close to 1000rds. First I had issues with brass losing primers after 3 firing. Man I don’t remember the powder, it was either H1000 or H4350 but I wasn’t getting the speeds near what I wanted. I was close to 2850-2900 barely with 115’s. I was able to push 115’s in my 6creed at 2970 easy. Of course I was on the upper end of pressure, but brass life was good, lasted 7 firings. I cut that barrel back and went back to creed.

 

[david walter]

What’s the 6GT offer that the 243 AI does not?

 

[trophyhunter]

LOL WAY better barrel life, way less powder which equals less recoil and no fireforming for starters

 

[Darkside-Six]

A vegan, a cross fitter, and someone shooting 6GT all walk into a bar. Who tells you about it first?

 

[Dthomas3523]

A vegan, a cross fitter, and someone shooting 6GT all walk into a bar. Who tells you about it first?

The guy training for mammoth

 

[47guy]

A vegan, a cross dresser, and a cross dresser shooting 6GT all walk into a hipster bar. Who tells you about it first?

Fixed it for you.

 

[Darkside-Six]

Fixed it for you.

Awe.....somebody is sensitive about the CrossFit. ??

 

[47guy]

Awe.....somebody is sensitive about the CrossFit. ??

cross fit..cross dresser..6GT im not judging.

 

[Tactical Taz]

 

[Niles Coyote]

Velocity mapping 109 Berger .015" off the lands, Hornady new brass, cci 450, 26" Bartlein/Impact prefit 7.5 twist.

RL16

H4350

 

[Mormegil87]

@Niles Coyote is your barrel direct from Impact?

 

[Niles Coyote]

@Niles Coyote is your barrel direct from Impact?

Yes it is.

 

[Mormegil87]

Yes it is.

Thanks.

 

[KYS]

Vu let me know when you want to jump down the rabbit hole of 22GT

 

[phlegethon]

Vu let me know when you want to jump down the rabbit hole of 22GT

Wouldn’t there be a lot of wasted case capacity? 22 Dasher can already drive 80 grain bullets faster than the PRS limit of 3200 fps. Assuming that’s the application.

 

[KYS]

Wouldn’t there be a lot of wasted case capacity? 22 Dasher can already drive 80 grain bullets faster than the PRS limit of 3200 fps. Assuming that’s the application.

Not when running 6.5 StaBall powder. I get 3200 out of an 85.5 Berger Hybrid easily.

 

[KYS]

But why you would use something other than Varget ...?

Because I can. And sometimes Varget is hard to come across. Always good to have options.
Varget doesn't fill the case that well before hitting pressure.

 

[Kadams1563]

Game time!

 

[KWilson]

Has anyone given RL15 a go in the 6GT?

 

[47guy]

can some of you guys that have been shooting the GT for awhile now post up how much your loosing out of the throat?
round count
powder used
how much lost

im really wanting to try the GT but i thought i read somewhere(AS maybe)that @NorCal Vu lost .035 at around 1080-1100 rounds...i know he was talking about the same .035 lost here in this tread at 1500ish.

 

[Niles Coyote]

Velocity mapping 109 Berger .015" off the lands, Hornady once fired brass, cci 450, 26" Bartlein/Impact prefit 7.5 twist.
StaBall6.5

 

[Darkside-Six]

Did some load work today with the 110 A-Tips with Varget and RL16. Found a decent load at 37.8 RL16 that gave me an average speed of 3022 with a 6.4 SD but it seems Varget is more consistent.

This is 34.6 grains of Varget which is the same load the 105 hybrids like. Little slower but was much more consistent across .5 grain.

 

[Skyking]

Barrel number 2
Bartlein 25inch 7.5 100 rounds down it now.
Virgin Hornady brass
Varget 34.5
Cci br4
Berger 109
100 yards 3 shots

 

[47guy]

Barrel number 2
Bartlein 25inch 7.5 100 rounds down it now.
Virgin Hornady brass
Varget 34.5
Cci br4
Berger 109
100 yards 3 shots

how many rounds did the last barrel go?

 

[LawnMM]

What he said

 

[MOshooter]

Because I can. And sometimes Varget is hard to come across. Always good to have options.
Varget doesn't fill the case that well before hitting pressure.

Because throwing powder charges is cool!

 

[Kadams1563]

Got the barrel chambered you today. Loading 105’s with alpha and H4350. Thinking of loading some at 36.5 or so for a break in load. What do you guys think?

 

[Skyking]

how many rounds did the last barrel go?

It only has 400 rounds on it. Going back to it after I get a few hundred rounds down this one.

 

[Jake the dog]

I find myself with a spare action and chassis that seem to be crying for a 6GT. Does a 26 or 28 inch, 1in 7.5 twist sound about right for 108 to 112 Bergers? Bench gun only, not going to be carried further than car to bench.

 

[fvalmostthere]

About to order my first gt barrel switching over from 6.5 creed. Cant decide whether to go with 105 hybrids or 115 dtacs? Haven't seen to much about the dtacs on here has anyone had luck pushing a 115? I have seen a bunch of posts about the 112 match burners so probably not much different, but curious anyways. I shot 123's out of my 6.5 at 3050 so the thought of shooting 115's at maybe 2950 seems slow and I know it will be less recoil but will it make that much difference? For what it is worth I have been shooting the 6.5 with a bare muzzle and the new barrel will have a gen 3 little bastard so I am already gaining there. If I go light and fast again how much barrel life am I losing? Thanks for any help!

 

[Dthomas3523]

About to order my first gt barrel switching over from 6.5 creed. Cant decide whether to go with 105 hybrids or 115 dtacs? Haven't seen to much about the dtacs on here has anyone had luck pushing a 115? I have seen a bunch of posts about the 112 match burners so probably not much different, but curious anyways. I shot 123's out of my 6.5 at 3050 so the thought of shooting 115's at maybe 2950 seems slow and I know it will be less recoil but will it make that much difference? For what it is worth I have been shooting the 6.5 with a bare muzzle and the new barrel will have a gen 3 little bastard so I am already gaining there. If I go light and fast again how much barrel life am I losing? Thanks for any help!

I’m running 109 hybrid. The BC is around .300 g7. That’s about what most people are getting for trued bc. Give or take a little

 

[fvalmostthere]

What are you getting for speed?

 

[Dthomas3523]

3k

Barrel is still under 100rnds. So I’m expecting 3020-3050

 

[fvalmostthere]

Nice, I haven't seen any posts of 105's getting more than 3050 so to get close to that with the 109 is great.

 

[Dthomas3523]

Nice, I haven't seen any posts of 105's getting more than 3050 so to get close to that with the 109 is great.

There‘s not much speed difference for 4grains.

Also, speed is overrated. Guys are winning with 2775 or so with 110’s.

 

[fvalmostthere]

Ive seen those numbers, guess it just must be less recoil allowing them to call shots better. Just ordered the barrel, and guess Ill have a few months to figure out what bullet and powder to run.